Brick LVM: Set C locale when gathering PV info
Brick LVM: Set C locale when gathering PV info

Some locales use commas as decimal separators, which means
that code breaks when someone expects to be able to use the
PV size as a float.

Change-Id: Idceb405e021ea8a0f44e19be43bad1307fbbb51c
Related-Bug: 1219963

leilihh/cinder,Thingee/cinder,rakeshmi/cinder,tlakshman26/cinder-new-branch,Accelerite/cinder,tlakshman26/cinder-https-changes,julianwang/cinder,github-borat/cinder,saeki-masaki/cinder,nikesh-mahalka/cinder,hguemar/cinder,spring-week-topos/cinder-week,mahak/cinder,Akrog/cinder,rakeshmi/cinder,ge0rgi/cinder,alex8866/cinder,phenoxim/cinder,duhzecca/cinder,cloudbase/cinder,JioCloud/cinder,j-griffith/cinder,spring-week-topos/cinder-week,JioCloud/cinder,petrutlucian94/cinder,takeshineshiro/cinder,alex8866/cinder,dims/cinder,Thingee/cinder,blueboxgroup/cinder,github-borat/cinder,tlakshman26/cinder-new-branch,saeki-masaki/cinder,nexusriot/cinder,nikesh-mahalka/cinder,CloudServer/cinder,Nexenta/cinder,Paul-Ezell/cinder-1,bswartz/cinder,Nexenta/cinder,apporc/cinder,eharney/cinder,NetApp/cinder,takeshineshiro/cinder,openstack/cinder,scottdangelo/RemoveVolumeMangerLocks,NetApp/cinder,j-griffith/cinder,redhat-openstack/cinder,duhzecca/cinder,winndows/cinder,manojhirway/ExistingImagesOnNFS,eharney/cinder,Hybrid-Cloud/cinder,sasukeh/cinder,tlakshman26/cinder-https-changes,abusse/cinder,leilihh/cinder,manojhirway/ExistingImagesOnNFS,mahak/cinder,Hybrid-Cloud/cinder,bswartz/cinder,CloudServer/cinder,scottdangelo/RemoveVolumeMangerLocks,hguemar/cinder,abusse/cinder,phenoxim/cinder,Akrog/cinder,Paul-Ezell/cinder-1,NeCTAR-RC/cinder,scality/cinder,Accelerite/cinder,cloudbase/cinder,potsmaster/cinder,Datera/cinder,julianwang/cinder,tlakshman26/cinder-bug-fix-volume-conversion-full,apporc/cinder,openstack/cinder,tlakshman26/cinder-bug-fix-volume-conversion-full,blueboxgroup/cinder,nexusriot/cinder,NeCTAR-RC/cinder,winndows/cinder,redhat-openstack/cinder,scality/cinder,potsmaster/cinder,dims/cinder,Datera/cinder,petrutlucian94/cinder,sasukeh/cinder,Thingee/cinder