Fix signature for create_volume to align with the base API
Fix signature for create_volume to align with the base API

vongazman/libcloud,iPlantCollaborativeOpenSource/libcloud,andrewsomething/libcloud,cloudControl/libcloud,pquentin/libcloud,iPlantCollaborativeOpenSource/libcloud,kater169/libcloud,briancurtin/libcloud,sergiorua/libcloud,carletes/libcloud,watermelo/libcloud,mgogoulos/libcloud,marcinzaremba/libcloud,illfelder/libcloud,carletes/libcloud,Cloud-Elasticity-Services/as-libcloud,Cloud-Elasticity-Services/as-libcloud,mathspace/libcloud,lochiiconnectivity/libcloud,illfelder/libcloud,jimbobhickville/libcloud,t-tran/libcloud,jerryblakley/libcloud,mtekel/libcloud,sergiorua/libcloud,schaubl/libcloud,niteoweb/libcloud,Kami/libcloud,Itxaka/libcloud,pantheon-systems/libcloud,MrBasset/libcloud,Verizon/libcloud,pquentin/libcloud,ByteInternet/libcloud,erjohnso/libcloud,apache/libcloud,carletes/libcloud,watermelo/libcloud,sergiorua/libcloud,Verizon/libcloud,mbrukman/libcloud,SecurityCompass/libcloud,sgammon/libcloud,mtekel/libcloud,wuyuewen/libcloud,illfelder/libcloud,aleGpereira/libcloud,wido/libcloud,cloudControl/libcloud,Scalr/libcloud,samuelchong/libcloud,Verizon/libcloud,sahildua2305/libcloud,cloudControl/libcloud,jimbobhickville/libcloud,samuelchong/libcloud,sfriesel/libcloud,curoverse/libcloud,MrBasset/libcloud,wrigri/libcloud,sahildua2305/libcloud,erjohnso/libcloud,DimensionDataCBUSydney/libcloud,mtekel/libcloud,wrigri/libcloud,wido/libcloud,niteoweb/libcloud,andrewsomething/libcloud,SecurityCompass/libcloud,lochiiconnectivity/libcloud,ByteInternet/libcloud,ClusterHQ/libcloud,kater169/libcloud,pantheon-systems/libcloud,JamesGuthrie/libcloud,aleGpereira/libcloud,Itxaka/libcloud,erjohnso/libcloud,munkiat/libcloud,mathspace/libcloud,StackPointCloud/libcloud,NexusIS/libcloud,lochiiconnectivity/libcloud,pantheon-systems/libcloud,jimbobhickville/libcloud,vongazman/libcloud,NexusIS/libcloud,wuyuewen/libcloud,smaffulli/libcloud,watermelo/libcloud,apache/libcloud,niteoweb/libcloud,atsaki/libcloud,Kami/libcloud,supertom/libcloud,smaffulli/libcloud,StackPointCloud/libcloud,JamesGuthrie/libcloud,aviweit/libcloud,sgammon/libcloud,sahildua2305/libcloud,briancurtin/libcloud,curoverse/libcloud,briancurtin/libcloud,marcinzaremba/libcloud,techhat/libcloud,supertom/libcloud,sfriesel/libcloud,thesquelched/libcloud,schaubl/libcloud,atsaki/libcloud,munkiat/libcloud,samuelchong/libcloud,ZuluPro/libcloud,mbrukman/libcloud,MrBasset/libcloud,mgogoulos/libcloud,ZuluPro/libcloud,dcorbacho/libcloud,Scalr/libcloud,mistio/libcloud,iPlantCollaborativeOpenSource/libcloud,wido/libcloud,jerryblakley/libcloud,Itxaka/libcloud,andrewsomething/libcloud,techhat/libcloud,DimensionDataCBUSydney/libcloud,schaubl/libcloud,curoverse/libcloud,ByteInternet/libcloud,StackPointCloud/libcloud,atsaki/libcloud,SecurityCompass/libcloud,mistio/libcloud,JamesGuthrie/libcloud,kater169/libcloud,techhat/libcloud,mgogoulos/libcloud,wuyuewen/libcloud,cryptickp/libcloud,ClusterHQ/libcloud,aleGpereira/libcloud,smaffulli/libcloud,wrigri/libcloud,DimensionDataCBUSydney/libcloud,dcorbacho/libcloud,aviweit/libcloud,ZuluPro/libcloud,t-tran/libcloud,dcorbacho/libcloud,Cloud-Elasticity-Services/as-libcloud,cryptickp/libcloud,NexusIS/libcloud,supertom/libcloud,marcinzaremba/libcloud,t-tran/libcloud,aviweit/libcloud,cryptickp/libcloud,munkiat/libcloud,pquentin/libcloud,thesquelched/libcloud,vongazman/libcloud,jerryblakley/libcloud,mbrukman/libcloud,mathspace/libcloud,mistio/libcloud,Scalr/libcloud,sfriesel/libcloud,apache/libcloud,thesquelched/libcloud,Kami/libcloud