Verify fix to writes on reads when LWW+Bitcask

This verifies the fix to issue basho/riak_kv#334
The test needs to run with bitcask:
  * It sets last_write_wins on a bucket
  * Writes on object
  * Repeatedly reads it
  * Verifies that the write/read repair count doesn't change
Merge pull request #189 from basho/eas-fix-lww-writes-on-read

Verify fix to writes on reads when LWW+Bitcask