Removed NPE possibility when creating JMembase
Removed NPE possibility when creating JMembase

If there is an issue creating JMembase then previous to this commit
a NPE would be thrown.

Change-Id: Ic4072753bcf98c0e95708ef54f6a52951e7ca9fa
Reviewed-on: http://review.couchbase.org/8793
Reviewed-by: Trond Norbye <60edd2ef23891a753f231b0c6f161dc634079a93@gmail.com>
Tested-by: Trond Norbye <60edd2ef23891a753f231b0c6f161dc634079a93@gmail.com>

Playtika/CouchbaseMock,mnunberg/CouchbaseMock,couchbase/CouchbaseMock,couchbase/CouchbaseMock,marwensaid/CouchbaseMock,marwensaid/CouchbaseMock,Playtika/CouchbaseMock,mnunberg/CouchbaseMock