[v9_14] mkeys: Prevent failing grep invocations
Some 'grep' invocations were not guarded from interrupting the test prematurely, e.g. when no text was matched.
(cherry picked from commit 6c4a2b60)
Some 'grep' invocations were not guarded from interrupting the test prematurely, e.g. when no text was matched.
(cherry picked from commit 6c4a2b60)