api: Move DynamicBridge to vdsmapi schema processing

Signed-off-by: Adam Litke <agl@us.ibm.com>
Change-Id: I0bbcc2475a40749c959eade157f6030b2c2f5e71
Reviewed-on: http://gerrit.ovirt.org/12107
Reviewed-by: Dan Kenigsberg <danken@redhat.com>
Tested-by: Dan Kenigsberg <danken@redhat.com>