modify image_import inputs in fvt test module
modify image_import inputs in fvt test module

Change-Id: If98daa5db0e46fffabc09527a20a0dff1d0ecc3f

mfcloud/python-zvm-sdk,mfcloud/python-zvm-sdk,mfcloud/python-zvm-sdk,mfcloud/python-zvm-sdk