Revert "Automate OVS bridge creation for multiple mappings"

After reviewing I5b1d49be8d9e3e331826e30182fba70f099b5e7f and
I161a157895b4ed0c9ea5a7a00302e30f4ad75ed3 - I have come to the
determination that this really should be in a DevStack plugin.

If both of the patches under review were to merge, we would be blessed
with at least the following variables:

OVS_NICS_FROM_BRIDGES
OVS_NIC_MAPPINGS
OVS_BRIDGE_MAPPINGS
OVS_PHYSICAL_BRIDGE
PHYSICAL_NETWORK
PUBLIC_PHYSICAL_NETWORK

Which really is not good. Let's just push this into a plugin, I don't
want to deal with it.

This reverts commit 3095ff51320291b3622cacc3bf2fb1043bff8d31.

Change-Id: I746022f5db93d3333101a014692fbdcd790a0004
diff --git a/lib/neutron_plugins/openvswitch_agent b/lib/neutron_plugins/openvswitch_agent
index e1c5a50..339d5fd 100644
--- a/lib/neutron_plugins/openvswitch_agent
+++ b/lib/neutron_plugins/openvswitch_agent
@@ -37,7 +37,6 @@
 }
 
 function neutron_plugin_configure_plugin_agent {
-    local mappings_array mapping phys_bridge
     # Setup integration bridge
     _neutron_ovs_base_setup_bridge $OVS_BRIDGE
     _neutron_ovs_base_configure_firewall_driver
@@ -53,15 +52,9 @@
     # complex physical network configurations.
     if [[ "$OVS_BRIDGE_MAPPINGS" == "" ]] && [[ "$PHYSICAL_NETWORK" != "" ]] && [[ "$OVS_PHYSICAL_BRIDGE" != "" ]]; then
         OVS_BRIDGE_MAPPINGS=$PHYSICAL_NETWORK:$OVS_PHYSICAL_BRIDGE
-    fi
 
-    if [[ "$OVS_BRIDGE_MAPPINGS" != "" ]]; then
-        IFS=',' read -a mappings_array <<< "$OVS_BRIDGE_MAPPINGS"
-        for mapping in "${mappings_array[@]}"; do
-            phys_bridge=`echo $mapping | cut -f 2 -d ":"`
-            # Configure bridge manually with physical interface as port for multi-node
-            _neutron_ovs_base_add_bridge $phys_bridge
-        done
+        # Configure bridge manually with physical interface as port for multi-node
+        _neutron_ovs_base_add_bridge $OVS_PHYSICAL_BRIDGE
     fi
     if [[ "$OVS_BRIDGE_MAPPINGS" != "" ]]; then
         iniset /$Q_PLUGIN_CONF_FILE ovs bridge_mappings $OVS_BRIDGE_MAPPINGS