Set the version to 2.0.2-SNAPSHOT

Change-Id: I0e18fec8bae9102e6be18dbadae5b417367b3899
Reviewed-on: http://review.couchbase.org/43554
Tested-by: Michael Nitschinger <michael.nitschinger@couchbase.com>
Reviewed-by: Simon Baslé <simon@couchbase.com>