Update vsphere image filename pattern
Update vsphere image filename pattern

The vsphere image filename pattern has been updated so that semi-
colons are used to delimit image properties rather than colons,
which are not permitted in Windows filesystems. To support back-
wards compatibility, colons can still be used.

Change-Id: I29a3ac03dcae294326dc8813a66512a79f705f81
Closes-Bug: #1250319

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