Use a set instead of a list to store currently running reasons, and
sort it when combining multiple entries into a string. This eliminates
duplicates and forces a "standard" ordering.

Risk: Low
Visibility: Eliminate duplicate warnings from the status log.

Signed-off-by: John Admanski <jadmanski@google.com>



git-svn-id: http://test.kernel.org/svn/autotest/trunk@3093 592f7852-d20e-0410-864c-8624ca9c26a4
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