Add server group support for JDBC mapping

As a Geode user, I want to specify which server group holds the region, so that I can add the JDBC mapping to that region.

Given a Geode region exists on a server group, when I run create jdbc-mapping for that region
Then I can specify the server group with an option on the command line, so that the jdbc-mapping is successfully recognized and completed.

Given create jdbc-mapping has a server group option defined, when I run describe jdbc-mapping, then I can see the server group option definition.