CLOUDSTACK-2864: Fix duplicate message on affinity group
CLOUDSTACK-2864: Fix duplicate message on affinity group

Fixes issue where text on affinity group step of instance wizard is
duplicated, when going back a step and making changes.

mufaddalq/cloudstack-datera-driver,mufaddalq/cloudstack-datera-driver,mufaddalq/cloudstack-datera-driver,mufaddalq/cloudstack-datera-driver,mufaddalq/cloudstack-datera-driver,mufaddalq/cloudstack-datera-driver