Allow username to differ from bucket name
Allow username to differ from bucket name

Change-Id: Ibecafe2f01291c36b9c9c576ba6bd3810b5cbb04
Reviewed-on: http://review.couchbase.org/74623
Reviewed-by: Sergey Avseyev <87f6d5e4fd3644c3c20800cde7fd3ad1569370b3@gmail.com>
Tested-by: Mark Nunberg <dab05a0fe859c5cb93882b2a75a0d613501b07be@couchbase.com>

avsej/libcouchbase,mody/libcouchbase,couchbase/libcouchbase,avsej/libcouchbase,avsej/libcouchbase,couchbase/libcouchbase,kojiromike/libcouchbase,avsej/libcouchbase,couchbase/libcouchbase,kojiromike/libcouchbase,mody/libcouchbase,avsej/libcouchbase,kojiromike/libcouchbase,mody/libcouchbase,avsej/libcouchbase,avsej/libcouchbase,couchbase/libcouchbase,kojiromike/libcouchbase,couchbase/libcouchbase,mody/libcouchbase,couchbase/libcouchbase,couchbase/libcouchbase