Cleanup old workaround for ipv6 VIPs

https://bugzilla.redhat.com/show_bug.cgi?id=1445628 has been fixed
in RHEL 7.3. There is no need to carry around this workaround any
longer.

We can entirely remove the nic parameter since it is set to '' by
default anyway in puppet-pacemaker.

Change-Id: Ia41046f148e0593ea773e8409494ce5dcca4b7a2

manifests/pacemaker/haproxy_with_vip.pp

@@ -70,15 +70,11 @@ define tripleo::pacemaker::haproxy_with_vip(
     if !is_ip_addresses($ip_address) {
       fail("Haproxy VIP: ${ip_address} is not a proper IP address.")
     }
-    # NB: Until the IPaddr2 RA has a fix for https://bugzilla.redhat.com/show_bug.cgi?id=1445628
-    # we need to specify the nic when creating the ipv6 vip.
     if is_ipv6_address($ip_address) {
       $netmask        = '128'
-      $nic            = interface_for_ip($ip_address)
       $ipv6_addrlabel = '99'
     } else {
       $netmask        = '32'
-      $nic            = ''
       $ipv6_addrlabel = ''
     }
 
@@ -91,7 +87,6 @@ define tripleo::pacemaker::haproxy_with_vip(
     pacemaker::resource::ip { "${vip_name}_vip":
       ip_address     => $ip_address,
       cidr_netmask   => $netmask,
-      nic            => $nic,
       ipv6_addrlabel => $ipv6_addrlabel,
       meta_params    => "resource-stickiness=INFINITY ${meta_params}",
       location_rule  => $location_rule,