Fixed issue: JENKINS-9693
Removed the call to request.getProjectBuildingRequest() because this  call creates a new ProjectBuildingRequest object and set's the BuildStartTime null.
Maven takes care of this by it self later.

Modified repository location in the pom.xml.
Merge branch 'master' into JENKINS-9693

Conflicts:
	maven-agent/src/main/java/hudson/maven/agent/Main.java
	maven3-agent/src/main/java/org/jvnet/hudson/maven3/agent/Maven3Main.java
Merge pull request #2 from rbierman/JENKINS-9693

[Fixed JENKINS-9693] maven.build.timestamp.format is not obeyed in maven builds