Add additional functionality to the grains module to allow a user to pass in a flag that deletes the key as well as the value. The old behavior was just to set the value to None and leave the key intact. Refs #7872.
Add additional functionality to the grains module to allow a user to pass in a flag that deletes the key as well as the value. The old behavior was just to set the value to None and leave the key intact. Refs #7872.

saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt