check notification enabled once
check notification enabled once

test plan 
 - specs should pass

refs VICE-654

Change-Id: I6ec39d77e59c3be50b2501636d2a2ca3aad079bb
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/243708
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>
Reviewed-by: Drake Harper <798ef92bc86a79e8ff768a68dc0a5fcec1d51660@instructure.com>
QA-Review: Drake Harper <798ef92bc86a79e8ff768a68dc0a5fcec1d51660@instructure.com>
Product-Review: Drake Harper <798ef92bc86a79e8ff768a68dc0a5fcec1d51660@instructure.com>

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