Added more regression tests to testHashDbJni().
Delete test kdb file (if it exists) before starting a new test.
Revert Autopsy regression test of JNI HashDB which is now tested in the TSK JNI unit test.
Merge remote-tracking branch 'upstream/develop' into hashdb_sqlite
Merge pull request #353 from SynapticNulship/hashdb_sqlite

Revert temporary Autopsy Regression Test changes.