Add some try/finally to DL Prostate test.  Long test currently fails with memory leak due to Exec2.  Unclear why.
Merge branch 'master' of https://github.com/0xdata/h2o
Ignore the long JUnit tests for DeepLearning to prevent Jenkins runs from taking too long.
Merge branch 'master' of https://github.com/0xdata/h2o