Adding SP to update management network name

Adding a new SP RenameManagementNetwork(v_name varchar(50) that updates
the management network name in both vdc_options & network tables.

Change-Id: I29b73e8fa1986610c931abdd2fea5b3536a3037d
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1059430
Signed-off-by: Eli Mesika <emesika@redhat.com>