Use build-helper-maven-plugin for build timestamp

[heuermh]

Removes the hack necessary to work around issues with maven.build.timestamp property.

[coveralls]

Coverage remained the same at 79.179% when pulling 24bd461 on heuermh:build-timestamp into c568c05 on bigdatagenomics:master.

[AmplabJenkins]

Test PASSed.
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https://amplab.cs.berkeley.edu/jenkins//job/ADAM-prb/2886/
Test PASSed.

[AmplabJenkins]

Test FAILed.
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Build result: FAILURE

GitHub pull request #2093 of commit 24bd461 automatically merged.Notifying endpoint 'HTTP:https://webhooks.gitter.im/e/ac8bb6e9f53357bc8aa8'[EnvInject] - Loading node environment variables.Building remotely on amp-jenkins-worker-05 (centos spark-test) in workspace /home/jenkins/workspace/ADAM-prbWiping out workspace first.Cloning the remote Git repositoryCloning repository https://github.com/bigdatagenomics/adam.git > git init /home/jenkins/workspace/ADAM-prb # timeout=10Fetching upstream changes from https://github.com/bigdatagenomics/adam.git > git --version # timeout=10 > git fetch --tags --progress https://github.com/bigdatagenomics/adam.git +refs/heads/:refs/remotes/origin/ # timeout=15 > git config remote.origin.url https://github.com/bigdatagenomics/adam.git # timeout=10 > git config --add remote.origin.fetch +refs/heads/:refs/remotes/origin/ # timeout=10 > git config remote.origin.url https://github.com/bigdatagenomics/adam.git # timeout=10Fetching upstream changes from https://github.com/bigdatagenomics/adam.git > git fetch --tags --progress https://github.com/bigdatagenomics/adam.git +refs/pull/:refs/remotes/origin/pr/ # timeout=15 > git rev-parse origin/pr/2093/merge^{commit} # timeout=10 > git branch -a -v --no-abbrev --contains 2760cbc # timeout=10Checking out Revision 2760cbc (origin/pr/2093/merge) > git config core.sparsecheckout # timeout=10 > git checkout -f 2760cbc6932f83e0ece603648c9c359c4a3afa1aFirst time build. Skipping changelog.Triggering ADAM-prb ? 2.7.5,2.11,2.2.2,ubuntuADAM-prb ? 2.7.5,2.11,2.2.2,ubuntu completed with result FAILURENotifying endpoint 'HTTP:https://webhooks.gitter.im/e/ac8bb6e9f53357bc8aa8'
Test FAILed.

[heuermh]

Jenkins, retest this please

[AmplabJenkins]

Test PASSed.
Refer to this link for build results (access rights to CI server needed):
https://amplab.cs.berkeley.edu/jenkins//job/ADAM-prb/2888/
Test PASSed.

[fnothaft]

Merged! Thanks @heuermh!