Warning mentioned is no more seen after the matching the callback url in config file and the one added to jenkins ( as mentioned in your previous comment)
But it still doesn't give the execution result back to Squash TM
Please find below the job console output
Started by user tmserver
Building in workspace C:\Documents and Settings\qa\.jenkins\workspace\templateSquashTAExecutionMavenJob
Fetching changes from the remote Git repository
Checking out Revision 3b808dfa5cc808ed93162f378ca9038dfdda8d0e (refs/remotes/origin/master)
provisoning config files...
copy managed file [conf.properties] to file:/C:/Documents%20and%20Settings/qa/.jenkins/taLinkConf.properties
Copying file to testsuite.json
Parsing POMs
[my.squash.ta.project] $ "C:\Program Files\Java\jdk1.7.0_75/bin/java" -cp "C:\Documents and Settings\qa\.jenkins\plugins\maven-plugin\WEB-INF\lib\maven3-agent-1.5.jar;C:\Test\Squash-TA-Toolbox\1.7.1-RELEASE\apache-maven-3.0.4\boot\plexus-classworlds-2.4.jar" org.jvnet.hudson.maven3.agent.Maven3Main C:\Test\Squash-TA-Toolbox\1.7.1-RELEASE\apache-maven-3.0.4 "C:\Documents and Settings\qa\.jenkins\war\WEB-INF\lib\remoting-2.49.jar" "C:\Documents and Settings\qa\.jenkins\plugins\maven-plugin\WEB-INF\lib\maven3-interceptor-1.5.jar" "C:\Documents and Settings\qa\.jenkins\plugins\maven-plugin\WEB-INF\lib\maven3-interceptor-commons-1.5.jar" 1146
channel started
Executing Maven: -B -f C:\Documents and Settings\qa\.jenkins\workspace\templateSquashTAExecutionMavenJob\my.squash.ta.project\pom.xml -Dstatus.update.events.url=
http://myserver:8080/squash -Dsquash.ta.external.id=402841f54bc5daf1014bf7cd5e9c0002 -Djobname=templateSquashTAExecutionMavenJob -Dhostname=${HOSTNAME} -Dsquash.ta.conf.file=C:\Documents and Settings\qa\.jenkins/taLinkConf.properties -Dta.tmcallback.reportbaseurl=
http://myserver:9090/job -Dta.tmcallback.jobexecutionid=198 -Dta.tmcallback.reportname=Squash_TA_HTML_Report -Dta.delete.json.file=true org.squashtest.ta::squash-ta-maven-plugin::run
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building my.squash.ta.project 1.0
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- squash-ta-maven-plugin:1.8.0-RELEASE:run (default-cli) @ my.squash.ta.project ---
[INFO] Loading external logging configuration: C:\Documents and Settings\qa\.jenkins\workspace\templateSquashTAExecutionMavenJob\my.squash.ta.project\src\log4j.properties
[INFO] Squash TA : compiling tests...
[INFO] Squash TA : initializing context...
[INFO] org.squashtest.ta.backbone.init.ComponentPackagesEnumerator - Listing sqhashTA engine component packages
[INFO] org.squashtest.ta.backbone.init.ComponentManifestParser - Loading plugin configuration for: org.squashtest.ta.enginecore
[INFO] org.squashtest.ta.backbone.init.ComponentManifestParser - Loading plugin configuration for: org.squashtest.ta.plugin.commons-component
[INFO] org.squashtest.ta.backbone.init.ComponentManifestParser - Loading plugin configuration for: org.squashtest.ta.plugin.filechecker
[INFO] org.squashtest.ta.backbone.init.ComponentManifestParser - Loading plugin configuration for: org.squashtest.ta.plugin.sahi
[INFO] org.squashtest.ta.backbone.init.ComponentManifestParser - Loading plugin configuration for: org.squashtest.ta.plugin.selenium
[INFO] org.squashtest.ta.backbone.init.ComponentManifestParser - Loading plugin configuration for: org.squashtest.ta.plugin.soapui
[INFO] org.squashtest.ta.backbone.init.ComponentManifestParser - Loading plugin configuration for: org.squashtest.ta.plugin.ftp
[INFO] org.squashtest.ta.backbone.init.ComponentManifestParser - Loading plugin configuration for: org.squashtest.ta.plugin.db
[INFO] org.squashtest.ta.backbone.init.ComponentManifestParser - Loading plugin configuration for: org.squashtest.ta.plugin.ssh
[INFO] org.squashtest.ta.backbone.init.ComponentManifestParser - Loading plugin configuration for: org.squashtest.ta.plugin.local.process
[INFO] Squash TA : testing...
[INFO] org.squashtest.ta.backbone.engine.impl.EcosystemRunnerImpl - Beginning execution of ecosystem tests
[INFO] org.squashtest.ta.backbone.engine.impl.TestRunnerImpl - Beginning execution of test first-test.ta
[INFO] org.squashtest.ta.backbone.engine.impl.TestRunnerImpl - Beginning execution of test PetStoreSeleniumTest.ta
Starting ChromeDriver 2.13.307647 (5a7d0541ebc58e69994a6fb2ed930f45261f3c29) on port 29476
Only local connections are allowed.
[INFO] Exporting results
[INFO] Cleaning resources
[INFO] Squash TA : build complete.
[INFO] org.squashtest.ta.core.tools.io.TempFileUtils - All the files from C:\DOCUME~1\qa\LOCALS~1\Temp\Squash_TA were properly deleted.
[JENKINS] Archiving disabled
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1:21.031s
[INFO] Finished at: Sun Mar 08 09:15:55 GST 2015
[INFO] Final Memory: 25M/60M
[INFO] ------------------------------------------------------------------------
[JENKINS] Archiving disabled
Waiting for Jenkins to finish collecting data
channel stopped
[htmlpublisher] Archiving HTML reports...
[htmlpublisher] Archiving at BUILD level C:\Documents and Settings\qa\.jenkins\workspace\templateSquashTAExecutionMavenJob\my.squash.ta.project\target\squashTA\html-reports to C:\Documents and Settings\qa\.jenkins\jobs\templateSquashTAExecutionMavenJob\builds\198\htmlreports\Squash_TA_HTML_Report
[htmlpublisher] Archiving at PROJECT level C:\Documents and Settings\qa\.jenkins\workspace\templateSquashTAExecutionMavenJob\my.squash.ta.project\target\squashTA\test-tree to C:\Documents and Settings\qa\.jenkins\jobs\templateSquashTAExecutionMavenJob\htmlreports\Test_list
Finished: SUCCESS
Is there something else that I need to check for in setup / configuration?