Fix an issue with rule put API endpoint return an error in case the body didn't contain "id" field.
Fix an issue with rule put API endpoint return an error in case the body
didn't contain "id" field.

Plexxi/st2,StackStorm/st2,StackStorm/st2,nzlosh/st2,nzlosh/st2,nzlosh/st2,StackStorm/st2,StackStorm/st2,nzlosh/st2,Plexxi/st2,Plexxi/st2,Plexxi/st2