restapi: Start and stop profiling on gluster volume

Action to start and stop profiling on gluster volume

Change-Id: Iddd7d83e753a842b688cc77c0a4f64b4b7e28de5
Bug-Url: https://bugzilla.redhat.com/1083583
Signed-off-by: Sahina Bose <sabose@redhat.com>