Fix failing test_list_sizes test
Fix failing test_list_sizes test

Note: Tests weren't running for us-west-2 and the failing test was 11
instances out of date

Closes #790

Signed-off-by: Tomaz Muraus <bb4af54d4692022d34bcf290dffd91d21e083d18@tomaz.me>

andrewsomething/libcloud,andrewsomething/libcloud,techhat/libcloud,illfelder/libcloud,mistio/libcloud,t-tran/libcloud,mistio/libcloud,samuelchong/libcloud,wuyuewen/libcloud,illfelder/libcloud,techhat/libcloud,SecurityCompass/libcloud,supertom/libcloud,ZuluPro/libcloud,NexusIS/libcloud,niteoweb/libcloud,iPlantCollaborativeOpenSource/libcloud,samuelchong/libcloud,StackPointCloud/libcloud,t-tran/libcloud,watermelo/libcloud,ByteInternet/libcloud,niteoweb/libcloud,mgogoulos/libcloud,mgogoulos/libcloud,pquentin/libcloud,mistio/libcloud,wuyuewen/libcloud,DimensionDataCBUSydney/libcloud,andrewsomething/libcloud,SecurityCompass/libcloud,iPlantCollaborativeOpenSource/libcloud,lochiiconnectivity/libcloud,lochiiconnectivity/libcloud,NexusIS/libcloud,lochiiconnectivity/libcloud,apache/libcloud,ByteInternet/libcloud,niteoweb/libcloud,illfelder/libcloud,vongazman/libcloud,ZuluPro/libcloud,techhat/libcloud,ByteInternet/libcloud,pquentin/libcloud,apache/libcloud,ZuluPro/libcloud,vongazman/libcloud,Scalr/libcloud,iPlantCollaborativeOpenSource/libcloud,Scalr/libcloud,vongazman/libcloud,Kami/libcloud,erjohnso/libcloud,SecurityCompass/libcloud,supertom/libcloud,DimensionDataCBUSydney/libcloud,Kami/libcloud,erjohnso/libcloud,erjohnso/libcloud,supertom/libcloud,mgogoulos/libcloud,apache/libcloud,pquentin/libcloud,DimensionDataCBUSydney/libcloud,Scalr/libcloud,t-tran/libcloud,wuyuewen/libcloud,watermelo/libcloud,samuelchong/libcloud,StackPointCloud/libcloud,NexusIS/libcloud,StackPointCloud/libcloud,Kami/libcloud,watermelo/libcloud