* Tests requiring image support use runTestHarnessWithCheck
Removing special case for images in runTestHarness.
Fixes#710
* Remove imageSupportRequired argument
Tests which require image support now specify this while
calling runTestHarnessWithCheck.
Fixes#710
Signed-off-by: Ellen Norris-Thompson <ellen.norris-thompson@arm.com>
* set gDeviceType in testharness.c, also moved gTestRounding to imageHelpers.cpp & .h and removed duplicate code from host_atomics.cpp
* Cleaned up some redundant code
* Reversed the change in testharness.c
