* 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>
* Moved all instances of gDeviceType to imageHelper.cpp
* Missed one instance of gDeviceType
* Removed all instances of extern cl_device_type gDeviceType, except in imageHelpers.h