xenapi: always reset JeOS's network
xenapi: always reset JeOS's network

If the JeOS template contained an exotic network configuration, the VM
prep step might fail. This patch resets the networking of the VM before
starting it.

Fixes bug 1245607

Change-Id: I921f1fdd0709d7a7760c4bb165e32f3898098bff

samgoon/devstack,LoHChina/devstack,dirkmueller/devstack,HPCHub/devstack,yamt/devstack,vsham20/devstack,CloudServer/devstack,mc2014/devstack,parul24/devstack,pombredanne/devstack,flavio-fernandes/devstack,rushiagr/devstack,nawawi/openstack,Mahito/devstack,sc68cal/devstack,sequenceiq/devstack,NaokiMiyata/devstack,thomasem/devstack,bljgaurav/openstack-test,LoHChina/devstack,j4/devstack,vishnugonela/devstack,prithivm/branch01,bigswitch/devstack,herrsechs/devstack,JioCloud/devstack,bigswitch/devstack,olivierlemasle/devstack,upadhyay-prashant/devstack,dtroyer/devstack,innodee/openstackk,atulpatil301/devstack,NaokiMiyata/devstack,richliu/devstack,andrewrothstein/devstack,kplus/devstack-moonshot,bq-xiao/devstack,neerja28/Devstack_GlusterFS,HPCHub/devstack,herrsechs/devstack,srics/devstack,dtroyer/devstack,pczerkas/devstack,bljgaurav/openstack-test,BSJAIN92/OpenStack,bswartz/devstack,neerja28/Devstack_GlusterFS,atulpatil301/devstack,costingalan/devstack,group-policy/devstack,ozamiatin/devstack,affo/devstack,parul24/devstack,CloudServer/devstack,thomasem/devstack,virtualopensystems/devstack,upadhyay-prashant/devstack,costingalan/devstack,j4/devstack,group-policy/devstack,mmasaki/devstack,Juniper/devstack,mssumanth/devstack,flavio-fernandes/devstack,pacinete/devstack,kplus/devstack-moonshot,vsham20/devstack,Mahito/devstack,ozamiatin/devstack,varunarya10/devstack,Millnert/contrail-devstack,noironetworks/devstack,jamielennox/devstack,mssumanth/devstack,olivierlemasle/devstack,noironetworks/devstack,sc68cal/devstack,mc2014/devstack,tianweizhang/devstack,eshnil2000/devstack,pacinete/devstack,bq-xiao/devstack,vishnugonela/devstack,richliu/devstack,openstack-dev/devstack,promptworks/devstack,tianweizhang/devstack,TwinkleChawla/devstack,pczerkas/devstack,dirkmueller/devstack,promptworks/devstack,rushiagr/devstack,liuquansheng47/devstack,avvocatodemarchis/devstack,eharney/devstack,openstack-dev/devstack,pombredanne/devstack,nuxeh/devstack,nawawi/openstack,sequenceiq/devstack,wenhuizhang/devstack,BSJAIN92/OpenStack,liuquansheng47/devstack,affo/devstack,mmasaki/devstack,varunarya10/devstack,TwinkleChawla/devstack,samgoon/devstack,bswartz/devstack,prithivm/branch01,avvocatodemarchis/devstack,wenhuizhang/devstack,eharney/devstack,williamthegrey/devstack,nuxeh/devstack,andrewrothstein/devstack