CBQE-0: some jobs change the couchbase data folder to /data from ini file, but this folder is not removed during uninstallation, so removing it

Change-Id: I3f4a45277d56b9fd6a6d1919dddb2cf17de2543a
Reviewed-on: http://review.couchbase.org/43169
Reviewed-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>
Tested-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>