Add posibilities to set tunnel_csum in ovs agent

Change-Id: I41e0babbe55711d1aef971c0134c6f349a40ae94
Closes-Bug: 1794268
Depends-On: https://review.openstack.org/609932/
(cherry picked from commit d3a56e4522)

puppet/services/neutron-ovs-agent.yaml

@@ -83,6 +83,13 @@ parameters:
     description: |
       Enable OVS Hardware Offload. This feature supported from OVS 2.8.0
     type: boolean
+  NeutronOVSTunnelCsum:
+    default: false
+    description: |
+      Set or un-set the tunnel header checksum  on outgoing IP packet
+      carrying GRE/VXLAN tunnel.
+    type: boolean
+
 
 conditions:
   no_firewall_driver: {equals : [{get_param: NeutronOVSFirewallDriver}, '']}
@@ -138,7 +145,8 @@ outputs:
             neutron::agents::ml2::ovs::arp_responder: {get_param: NeutronEnableARPResponder}
             neutron::agents::ml2::ovs::tunnel_types: {get_param: NeutronTunnelTypes}
             neutron::agents::ml2::ovs::extensions: {get_param: NeutronAgentExtensions}
-            # NOTE: bind IP is found in Heat replacing the network name with the
+            neutron::agents::ml2::ovs::tunnel_csum: {get_param: NeutronOVSTunnelCsum}
+            # NOTE: bind IP is found in hiera replacing the network name with the
             # local node IP for the given network; replacement examples
             # (eg. for internal_api):
             # internal_api -> IP

releasenotes/notes/bug-1794268-0f875aa640b4246e.yaml

@@ -0,0 +1,6 @@
+---
+features:
+  - |
+    Adds posibilities to set 'neutron::agents::ml2::ovs::tunnel_csum' via NeutronOVSTunnelCsum
+    in heat template. This param set or un-set the tunnel header checksum  on
+    outgoing IP packet carrying GRE/VXLAN tunnel in ovs agent.