Added trove config group section
Added trove config group section

The trove chapter in the user guide did not have
a section on how to use configuration groups.

This commit covers how to use config groups
to configure database parameters.

This commit completes the implementation of the
blueprint.

Edits for consistency - df

Change-Id: I749e7a1b0d2bfac799555844a15a99b24b46b7a2
blueprint: user-guide-trove-chapter

gongysh2004/openstack-manual,AlekhyaMallina-Vedams/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,saeki-masaki/openstack-manuals,kairoaraujo/openstack-manuals,openstack/openstack-manuals,kairoaraujo/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,potsmaster/openstack-manuals,openstack/openstack-manuals,saeki-masaki/openstack-manuals,Akasurde/openstack-manuals,potsmaster/openstack-manuals,gongysh2004/openstack-manual,Akasurde/openstack-manuals