Use br-int when XenServer is hypervisor

Previously we use a specific integration bridge for neutron ovs agent
which is running in compute node, but this isn't necessary, this
patch is to remove the specific integration bridge for XenSever and
remove the custom integration bridge definition

Depends-On: I675565e1ea6c887d40d7a53f62968c4aa385ecca

Change-Id: If5886e3711765a97f40f20e478f958b988b5a620
diff --git a/tools/xen/install_os_domU.sh b/tools/xen/install_os_domU.sh
index d2e2c57..ac7af0d 100755
--- a/tools/xen/install_os_domU.sh
+++ b/tools/xen/install_os_domU.sh
@@ -66,10 +66,6 @@
 setup_network "$MGT_BRIDGE_OR_NET_NAME"
 setup_network "$PUB_BRIDGE_OR_NET_NAME"
 
-# With neutron, one more network is required, which is internal to the
-# hypervisor, and used by the VMs
-setup_network "$XEN_INT_BRIDGE_OR_NET_NAME"
-
 if parameter_is_specified "FLAT_NETWORK_BRIDGE"; then
     if [ "$(bridge_for "$VM_BRIDGE_OR_NET_NAME")" != "$(bridge_for "$FLAT_NETWORK_BRIDGE")" ]; then
         cat >&2 << EOF
@@ -292,15 +288,9 @@
 #
 $THIS_DIR/build_xva.sh "$GUEST_NAME"
 
-# Attach a network interface for the integration network (so that the bridge
-# is created by XenServer). This is required for Neutron. Also pass that as a
-# kernel parameter for DomU
-attach_network "$XEN_INT_BRIDGE_OR_NET_NAME"
-
 XEN_INTEGRATION_BRIDGE_DEFAULT=$(bridge_for "$XEN_INT_BRIDGE_OR_NET_NAME")
 append_kernel_cmdline \
-    "$GUEST_NAME" \
-    "xen_integration_bridge=${XEN_INTEGRATION_BRIDGE_DEFAULT}"
+    "$GUEST_NAME"
 
 FLAT_NETWORK_BRIDGE="${FLAT_NETWORK_BRIDGE:-$(bridge_for "$VM_BRIDGE_OR_NET_NAME")}"
 append_kernel_cmdline "$GUEST_NAME" "flat_network_bridge=${FLAT_NETWORK_BRIDGE}"