Teiid Connection importer by default only waits for 120 seconds for schema

When using the Teiid connection importer it sends the query to the server and waits for up to 120 seconds for server to return metadata. If the server returned data it is fine, otherwise it fails.

Some times when working with larger metadata or slower connections it may take more than 120 seconds, the UI should give user an option to terminate or wait for another +n of seconds.