Merge pull request #535 from e-cuellar/master

[BACKLOG-290] Fixed MetadataResourceTest
[BACKLOG-755] -- added unit test for comment endpoint validation
Merge pull request #537 from krivera-pentaho/dev

[BACKLOG-755] -- added unit test for comment endpoint validation
[BACKLOG-755] - fix for nightly build
Merge pull request #538 from krivera-pentaho/dev

[BACKLOG-755] - fix for nightly build
[BACKLOG-755] -- fixed source due to failing unit test
Merge pull request #539 from krivera-pentaho/dev

[BACKLOG-755] -- fixed source due to failing unit test
[BACKLOG-755] Delete refactoring to use DELETE instead of POST