Handle case, when connection_options set by URI

Change-Id: I96cc018b4058d016110640696b866d853bf4d226
Reviewed-on: http://review.couchbase.org/28968
Tested-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Reviewed-by: Matt Ingenthron <matt@couchbase.com>