added test to check that spaxel spectrum is consistent in all modes
added test to check that spaxel spectrum is consistent in all modes

bretthandrews/marvin,albireox/marvin,bretthandrews/marvin,albireox/marvin,albireox/marvin,albireox/marvin,sdss/marvin,sdss/marvin,sdss/marvin,sdss/marvin,bretthandrews/marvin,bretthandrews/marvin