Don't call QSKIP/QVERIFY outside of test functions.

Don't call QSKIP/QVERIFY outside of test functions.

These macros should only be called inside a test function, otherwise
they cannot abort the test function correctly.  Solve this by making the
helper function return a boolean result (and output a warning on
failure to help with debugging) and verify the return value in each test
function that calls the helper.

Change-Id: I599673fda49051baf80a8c94b5d85a4d8c2cb406
Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>