Devstack plugin for network-segment-range api

This patch implements devstack plugin for network-segment-range api.
The network-segment-range api service is based on network-segment-range
spec [1].

[1] https://specs.openstack.org/openstack/neutron-specs/specs/stein/network-segment-range-management.html

Co-authored-by: Allain Legacy <Allain.legacy@windriver.com>

Partially-implements: blueprint network-segment-range-management
Change-Id: I09116a4323763db12917e03f354cf0ef25289fd0

devstack/lib/network_segment_range

@@ -0,0 +1,3 @@
+function configure_network_segment_range {
+    neutron_service_plugin_class_add "network_segment_range"
+}

devstack/plugin.sh

@@ -6,6 +6,7 @@ source $LIBDIR/l2_agent
 source $LIBDIR/l2_agent_sriovnicswitch
 source $LIBDIR/l3_agent
 source $LIBDIR/ml2
+source $LIBDIR/network_segment_range
 source $LIBDIR/qos
 source $LIBDIR/ovs
 source $LIBDIR/segments
@@ -56,6 +57,9 @@ if [[ "$1" == "stack" ]]; then
             if is_service_enabled neutron-segments; then
                 configure_segments_extension
             fi
+            if is_service_enabled neutron-network-segment-range; then
+                configure_network_segment_range
+            fi
             if is_service_enabled q-agt neutron-agent; then
                 configure_l2_agent
             fi

neutron/tests/contrib/gate_hook.sh

@@ -102,6 +102,7 @@ case $VENV in
     load_rc_hook qos
     load_rc_hook segments
     load_rc_hook trunk
+    load_rc_hook network_segment_range
     load_conf_hook vlan_provider
     load_conf_hook osprofiler
     load_conf_hook availability_zone

neutron/tests/contrib/hooks/api_all_extensions

@@ -33,6 +33,7 @@ NETWORK_API_EXTENSIONS+=",net-mtu"
 NETWORK_API_EXTENSIONS+=",net-mtu-writable"
 NETWORK_API_EXTENSIONS+=",network-ip-availability"
 NETWORK_API_EXTENSIONS+=",network_availability_zone"
+NETWORK_API_EXTENSIONS+=",network-segment-range"
 NETWORK_API_EXTENSIONS+=",pagination"
 NETWORK_API_EXTENSIONS+=",port-security"
 NETWORK_API_EXTENSIONS+=",project-id"

neutron/tests/contrib/hooks/network_segment_range

@@ -0,0 +1 @@
+enable_service neutron-network-segment-range