Removing the indexing hbase-0.94.9-contrib module

Moving everything over to 0.94.10-SNAPSHOT for HBASE-8809.

Currently an unreleased HBase version  - needed for correct maintenance behavior.
You can get away running HBase 0.94.9 if you write your own maintainer and don't care about
cleaning the index for 'back in time' updates. However, if you get out of order updates to
a row that goes outside the max versions, raw scanning will not return the correct results
for the current row, leading to incorrect index maintenance.... you've been warned.