SCHEMA-786. Bump versions of CDH5 artifacts in bridge to CDH5.0.1 from beta-2.

Testing done: mvn clean verify

issue: https://jira.kiji.org/browse/SCHEMA-786
review: https://review.kiji.org/r/1875
SCHEMA-776. Enable bridge support for CDH 4.6

issue: https://jira.kiji.org/browse/SCHEMA-776
review: https://review.kiji.org/r/1843
SCHEMA-644 Added tweet avrò record, and new layout that uses RKF2 w hashed encoding.

Testing done: mvm clean install.  Some tests on new layout, some on legacy.
    issue: https://jira.kiji.org/browse/SCHEMA-644

    review: https://review.kiji.org/r/1777/
Fix maven skip tests enforcer rule.
SCHEMA-785. Make TableLayoutMonitor explicitly reference counted

issue: https://jira.kiji.org/browse/SCHEMA-785
review: https://review.kiji.org/r/1873
SCHEMA-798. Delete Tool should not open an instance while deleting it

issue: https://jira.kiji.org/browse/SCHEMA-798
review: https://review.kiji.org/r/1889
SCHEMA-801. Correctly handle empty columns

issue: https://jira.kiji.org/browse/SCHEMA-801
review: https://review.kiji.org/r/1894
SCHEMA-775. Refactor KijiColumnNameTranslator/HBaseColumnName/LayoutCapsule

issue: https://jira.kiji.org/browse/SCHEMA-775