FIXED JENKINS-15025 - no additional info in console log about failures

Fix JENKINS-15025 problem in Jenkins jobs of type Maven2/3 where in case of failure there no descriptions, only stacktraces of the Maven3Launcher was shown.

Now exceptions in the MavenExecutionResult are handled as in MavenCli and logged to console (with highlight).
![buildfail](https://f.cloud.github.com/assets/4160180/798714/a1ca4048-ed66-11e2-9470-0a89f8b31bb4.jpg)

Errors are managed into hudson.maven.util.ExecutionEventLogger after log Reactor Summary, using the same log of entire maven process. Remove unusefull printstacktrace block from hudson.maven.Maven3Build

I had try to keep original code format (I hope).