Unable to connect via ssh from one instance to another with floating ip

branch: stable/mitaka
commit: fe269163db36afa48889fd514b15b524b3dc0e2c
fuel build:fuel-9.0-308-2016-05-11_02-00-00.iso

Now we are not able to connect from one instance to another with floating ip via ssh.

            1. Upload plugin to the master node
            2. Install plugin.
            3. Create cluster with vcenter.
            4. Add 3 node with controller role.
            5. Add 1 node with compute role.
            6. Deploy the cluster.
            7. Split Availability zone 'vcenter'. Move one vmcluster to
               created az.
            8. Launch instance VM_1 in the tenant network net_1 with
               image.
               TestVM-VMDK and flavor m1.tiny in the vcenter1 az.
            9. Launch instance VM_2 in the tenant net_2 with image
               TestVM-VMDK and flavor m1.tiny in the vcenter2 az.
            10. Create security groups SG_1 to allow ICMP traffic.
            11. Add Ingress rule for ICMP protocol to SG_1.
            12. Create security groups SG_2 to allow TCP traffic 22
                port.
                Add Ingress rule for TCP protocol to SG_2.
            13. Attach SG_1 to VMs.
            14. Attach SG_2 to VMs.
            15. Check ping between VM_1 and VM_2 and vice verse.
            16. ssh from VM_1 to VM_2 and vice verse.