Fixes unicode issue in the Hyper-V driver
Fixes unicode issue in the Hyper-V driver

The XML string returned by the WMI API calls requires unicode
conversion before further processing, e.g. with ElementTree.

This affects the vhdutilsv2._get_vhd_info_xml method due to
the textual description. The issue came to light using the
host with Chinese locale, while not present on a en_US host.

Fixes bug: #1229671

Change-Id: I09435a205abfc8ae9470c53c5446cbb28dee0115

zhimin711/nova,double12gzh/nova,yatinkumbhare/openstack-nova,jianghuaw/nova,tanglei528/nova,petrutlucian94/nova_dev,MountainWei/nova,virtualopensystems/nova,ewindisch/nova,orbitfp7/nova,alexandrucoman/vbox-nova-driver,sebrandon1/nova,apporc/nova,sacharya/nova,adelina-t/nova,raildo/nova,tealover/nova,saleemjaveds/https-github.com-openstack-nova,shahar-stratoscale/nova,scripnichenko/nova,Juniper/nova,devendermishrajio/nova_test_latest,MountainWei/nova,cyx1231st/nova,felixma/nova,gooddata/openstack-nova,isyippee/nova,barnsnake351/nova,JioCloud/nova_test_latest,Juniper/nova,whitepages/nova,mandeepdhami/nova,NeCTAR-RC/nova,watonyweng/nova,cyx1231st/nova,silenceli/nova,apporc/nova,ewindisch/nova,BeyondTheClouds/nova,j-carpentier/nova,joker946/nova,berrange/nova,adelina-t/nova,BeyondTheClouds/nova,BeyondTheClouds/nova,Stavitsky/nova,CEG-FYP-OpenStack/scheduler,berrange/nova,OpenAcademy-OpenStack/nova-scheduler,takeshineshiro/nova,j-carpentier/nova,yosshy/nova,bgxavier/nova,Metaswitch/calico-nova,Juniper/nova,phenoxim/nova,TwinkleChawla/nova,thomasem/nova,edulramirez/nova,ted-gould/nova,ruslanloman/nova,saleemjaveds/https-github.com-openstack-nova,devendermishrajio/nova_test_latest,shahar-stratoscale/nova,devendermishrajio/nova,kimjaejoong/nova,kimjaejoong/nova,gooddata/openstack-nova,cloudbase/nova,cloudbase/nova-virtualbox,Tehsmash/nova,vmturbo/nova,openstack/nova,Stavitsky/nova,iuliat/nova,nikesh-mahalka/nova,cernops/nova,tealover/nova,mgagne/nova,maelnor/nova,belmiromoreira/nova,isyippee/nova,felixma/nova,rahulunair/nova,virtualopensystems/nova,zhimin711/nova,vmturbo/nova,devoid/nova,tianweizhang/nova,eharney/nova,iuliat/nova,eayunstack/nova,JioCloud/nova,imsplitbit/nova,mmnelemane/nova,rajalokan/nova,tudorvio/nova,orbitfp7/nova,luogangyi/bcec-nova,angdraug/nova,yosshy/nova,JioCloud/nova_test_latest,JianyuWang/nova,Juniper/nova,varunarya10/nova_test_latest,JianyuWang/nova,whitepages/nova,leilihh/nova,mmnelemane/nova,imsplitbit/nova,redhat-openstack/nova,viggates/nova,raildo/nova,shail2810/nova,spring-week-topos/nova-week,tanglei528/nova,leilihh/nova,jianghuaw/nova,varunarya10/nova_test_latest,yatinkumbhare/openstack-nova,zaina/nova,angdraug/nova,takeshineshiro/nova,scripnichenko/nova,shail2810/nova,Francis-Liu/animated-broccoli,hanlind/nova,edulramirez/nova,blueboxgroup/nova,vmturbo/nova,luogangyi/bcec-nova,akash1808/nova,Yusuke1987/openstack_template,Francis-Liu/animated-broccoli,openstack/nova,rajalokan/nova,bigswitch/nova,mikalstill/nova,CloudServer/nova,petrutlucian94/nova,spring-week-topos/nova-week,rajalokan/nova,eayunstack/nova,alexandrucoman/vbox-nova-driver,noironetworks/nova,zzicewind/nova,rahulunair/nova,CloudServer/nova,mahak/nova,jianghuaw/nova,Yusuke1987/openstack_template,affo/nova,zaina/nova,sebrandon1/nova,Metaswitch/calico-nova,noironetworks/nova,CiscoSystems/nova,sebrandon1/nova,klmitch/nova,thomasem/nova,vladikr/nova_drafts,leilihh/novaha,jeffrey4l/nova,cloudbase/nova-virtualbox,mikalstill/nova,cernops/nova,viggates/nova,cernops/nova,projectcalico/calico-nova,akash1808/nova,akash1808/nova_test_latest,rajalokan/nova,JioCloud/nova,cloudbase/nova,nikesh-mahalka/nova,eonpatapon/nova,openstack/nova,blueboxgroup/nova,Tehsmash/nova,akash1808/nova_test_latest,TwinkleChawla/nova,tangfeixiong/nova,OpenAcademy-OpenStack/nova-scheduler,jeffrey4l/nova,ted-gould/nova,klmitch/nova,rahulunair/nova,mahak/nova,affo/nova,zzicewind/nova,belmiromoreira/nova,silenceli/nova,gooddata/openstack-nova,alvarolopez/nova,redhat-openstack/nova,ruslanloman/nova,mahak/nova,dawnpower/nova,fnordahl/nova,vmturbo/nova,hanlind/nova,mandeepdhami/nova,CEG-FYP-OpenStack/scheduler,rrader/nova-docker-plugin,alvarolopez/nova,jianghuaw/nova,leilihh/novaha,tianweizhang/nova,barnsnake351/nova,phenoxim/nova,alaski/nova,devendermishrajio/nova,badock/nova,tangfeixiong/nova,cloudbase/nova,double12gzh/nova,bgxavier/nova,hanlind/nova,projectcalico/calico-nova,rrader/nova-docker-plugin,klmitch/nova,CCI-MOC/nova,alaski/nova,eonpatapon/nova,watonyweng/nova,CCI-MOC/nova,LoHChina/nova,bigswitch/nova,gooddata/openstack-nova,dims/nova,LoHChina/nova,petrutlucian94/nova_dev,NeCTAR-RC/nova,dawnpower/nova,petrutlucian94/nova,badock/nova,devoid/nova,eharney/nova,joker946/nova,maelnor/nova,mikalstill/nova,klmitch/nova,tudorvio/nova,CiscoSystems/nova,fnordahl/nova,sacharya/nova,dims/nova,mgagne/nova,vladikr/nova_drafts