Implement custom ReferenceRegion hashcode

[arahuja]

Fixes #817

[AmplabJenkins]

Test FAILed.
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GitHub pull request #819 of commit d8aeec9 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-prb > git rev-parse --is-inside-work-tree # timeout=10Fetching changes from the remote Git repository > git config remote.origin.url https://github.com/bigdatagenomics/adam.git # 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/pull/:refs/remotes/origin/pr/ > git rev-parse origin/pr/819/merge^{commit} # timeout=10 > git branch -a --contains 5703e8407d7e8a35f1d3daa112957eebef74e51c # timeout=10 > git rev-parse remotes/origin/pr/819/merge^{commit} # timeout=10Checking out Revision 5703e8407d7e8a35f1d3daa112957eebef74e51c (origin/pr/819/merge) > git config core.sparsecheckout # timeout=10 > git checkout -f 5703e8407d7e8a35f1d3daa112957eebef74e51cFirst time build. Skipping changelog.Triggering ADAM-prb ? 2.6.0,2.10,1.4.1,centosTriggering ADAM-prb ? 2.6.0,2.11,1.4.1,centosTouchstone configurations resulted in FAILURE, so aborting...Notifying endpoint 'HTTP:https://webhooks.gitter.im/e/ac8bb6e9f53357bc8aa8'
Test FAILed.

[arahuja]

Looks the fields can be null sometimes - adding a null check

[AmplabJenkins]

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Build result: FAILURE

GitHub pull request #819 of commit 4c8d1f8 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-prb > git rev-parse --is-inside-work-tree # timeout=10Fetching changes from the remote Git repository > git config remote.origin.url https://github.com/bigdatagenomics/adam.git # 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/pull/:refs/remotes/origin/pr/ > git rev-parse origin/pr/819/merge^{commit} # timeout=10 > git branch -a --contains 86b1ddd0d0814c287b671dc1a02be6642b8f7eab # timeout=10 > git rev-parse remotes/origin/pr/819/merge^{commit} # timeout=10Checking out Revision 86b1ddd0d0814c287b671dc1a02be6642b8f7eab (origin/pr/819/merge) > git config core.sparsecheckout # timeout=10 > git checkout -f 86b1ddd0d0814c287b671dc1a02be6642b8f7eabFirst time build. Skipping changelog.Triggering ADAM-prb ? 2.6.0,2.10,1.4.1,centosTriggering ADAM-prb ? 2.6.0,2.11,1.4.1,centosTouchstone configurations resulted in FAILURE, so aborting...Notifying endpoint 'HTTP:https://webhooks.gitter.im/e/ac8bb6e9f53357bc8aa8'
Test FAILed.

[AmplabJenkins]

Test PASSed.
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Test PASSed.

[laserson]

Does this mean that two ReferenceRegion objects that differ only in that one has start=0 and the other has start=null would have the same hashCode?

[laserson]

oh, sorry, I read that as start rather than start.hashCode.

[fnothaft]

Thanks @arahuja! I've manually committed this as c4b23e0.