Added delete test for in-memory inverted index (only adding key to LSM buddy BTree can lead to false positives, practically impossible to test). Fixed a bug in the counting BTree cursor when dealing with empty pages due to deletes.

git-svn-id: https://hyracks.googlecode.com/svn/branches/hyracks_inverted_index_updates_new@1852 123451ca-8445-de46-9d55-352943316053
15 files changed