Bug:#1380771 Adding the load balancer session persistence parameters fro Service Instance's Virtual ip. The session persistense type and name are written to haproxy configuration file in the backend section

Change-Id: I44a2b5c750f2ab62221d5bd43925df3de2dc85cd
Merge "Bug:#1380771 Adding the load balancer session persistence parameters fro Service Instance's Virtual ip. The session persistense type and name are written to haproxy configuration file in the backend section"