cppcheck test dir.

[avan989]

Is your feature request related to a problem? Please describe.
From issue #303

[osal/src/tests/mutex-test/mutex-test.c:46] -> [osal/src/tests/mutex-test/mutex-test.c:47]: (style) Variable 'status' is reassigned a value before the old one has been used.
[osal/src/tests/mutex-test/mutex-test.c:98] -> [osal/src/tests/mutex-test/mutex-test.c:100]: (style) Variable 'status' is reassigned a value before the old one has been used.
[osal/src/tests/mutex-test/mutex-test.c:153] -> [osal/src/tests/mutex-test/mutex-test.c:154]: (style) Variable 'status' is reassigned a value before the old one has been used.

Requester Info
Anh Van, NASA Goddard

[jphickey]

See also #157

[skliper]

No plan to fix cppcheck "style" issues in test code.