cmd_rtpengine: added group short help

kamcli/commands/cmd_rtpengine.py

@@ -5,7 +5,11 @@ from kamcli.cli import pass_context
 from kamcli.iorpc import command_ctl
 
 
[email protected]("rtpengine", help="Manage rtpengine module")
[email protected](
+    "rtpengine",
+    help="Manage rtpengine module",
+    short_help="Manage rtpengine module",
+)
 @pass_context
 def cli(ctx):
     pass