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.

DaanHoogland/cloudstack,GabrielBrascher/cloudstack,resmo/cloudstack,jcshen007/cloudstack,wido/cloudstack,resmo/cloudstack,wido/cloudstack,resmo/cloudstack,GabrielBrascher/cloudstack,resmo/cloudstack,wido/cloudstack,DaanHoogland/cloudstack,DaanHoogland/cloudstack,resmo/cloudstack,resmo/cloudstack,GabrielBrascher/cloudstack,jcshen007/cloudstack,jcshen007/cloudstack,wido/cloudstack,GabrielBrascher/cloudstack,jcshen007/cloudstack,DaanHoogland/cloudstack,DaanHoogland/cloudstack,GabrielBrascher/cloudstack,DaanHoogland/cloudstack,jcshen007/cloudstack,DaanHoogland/cloudstack,GabrielBrascher/cloudstack,resmo/cloudstack,wido/cloudstack,wido/cloudstack,jcshen007/cloudstack,wido/cloudstack,GabrielBrascher/cloudstack,jcshen007/cloudstack