CBD-87: better MBFSource.db_filesnames pattern and err handling
CBD-87: better MBFSource.db_filesnames pattern and err handling

Change-Id: Ic9b3a2a6e9abb658db951d74a2d13f63e69e1b2b
Reviewed-on: http://review.couchbase.org/17495
Reviewed-by: Pavel Paulau <dd88eded64e90046a680e3a6c0828ceb8fe8a0e7@gmail.com>
Tested-by: Steve Yen <ef850f73f7832052d3c6d9b5ddd3a1716d9a57f1@gmail.com>

couchbase/couchbase-cli,couchbaselabs/couchbase-cli,couchbase/couchbase-cli,couchbaselabs/couchbase-cli,membase/membase-cli,membase/membase-cli,membase/membase-cli,couchbaselabs/couchbase-cli