This API is not in use and it has not been properly modeled.
An RPC needs to have an input to be properly routed otherwise an exception will be thrown when registering.
Also see,
- Bug 596
- Gerrit https://git.opendaylight.org/gerrit/#/c/5781/
Change-Id: I28d517fe86ed63590fbd8fa17be712b581141869
Signed-off-by: Moiz Raja <moraja@cisco.com>