Prefer QSKIP to QTEST_NOOP_MAIN.

Prefer QSKIP to QTEST_NOOP_MAIN.

There is no way for a .pro file to know if exceptions are supported in
the Qt build, so these tests cannot be omitted from the build if
exceptions are not supported. Because of this limitation, these tests
were using QTEST_NOOP_MAIN when exceptions were not available, making
the tests appear to pass.  This commit changes QTEST_NOOP_MAIN to QSKIP,
so that the user receives a clear indication that the test isn't testing
anything when exceptions are not available.

Change-Id: I2facf08ba69e6f985e2da50dd36ad2658246b22e
Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>