CBQE-0: fix remove_remote_cluster when name with spaces

Change-Id: Id240267325cd1612cb237d60049f009452e001c9
Reviewed-on: http://review.couchbase.org/27295
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>