Update tox lint step to also verify syntax in the pricing.json file.
Update tox lint step to also verify syntax in the pricing.json file.

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