MB-17035: Do not allow changing of index storage mode when ...
MB-17035: Do not allow changing of index storage mode when ...

running in community edition or when there are index nodes present.

Change-Id: Iad93d0d675c2badc6af203d169bbc6f98c423f3e
Reviewed-on: http://review.couchbase.org/59166
Tested-by: Poonam D <6855f09986fe28ed7e8cdd9d60db878d898703d5@couchbase.com>
Reviewed-by: Artem Stemkovski <15a0730a27c69f62ab86f2b6c639fca202166c02@couchbase.com>

ceejatec/ns_server,membase/ns_server,ceejatec/ns_server,ceejatec/ns_server,membase/ns_server,ceejatec/ns_server,membase/ns_server,membase/ns_server,ceejatec/ns_server,membase/ns_server,ceejatec/ns_server,membase/ns_server