NSXv: Edge firewall default timeout should be 7200

When creating and updating Edge firewall, we should maintain a TCP
timeout of 7200 seconds, instead of the default of 3600.

Change-Id: I30dcc9c25f93d24175daa8cd17d11476eb1fe6e1

vmware_nsx/plugins/nsx_v/vshield/edge_appliance_driver.py

@@ -51,6 +51,16 @@ class EdgeApplianceDriver(object):
             'fqdn': None,
             'enableAesni': enable_aesni,
             'enableFips': enable_fips,
+            'featureConfigs': {
+                'features': [
+                    {
+                        'featureType': 'firewall_4.0',
+                        'globalConfig': {
+                            'tcpTimeoutEstablished': 7200
+                        }
+                    }
+                ]
+            },
             'cliSettings': {
                 'remoteAccess': remote_access
             },

vmware_nsx/plugins/nsx_v/vshield/edge_firewall_driver.py

@@ -163,6 +163,7 @@ class EdgeFirewallDriver(db_base_plugin_v2.NeutronDbPluginV2):
                  'ruleTag': ruleTag})
         return {
             'featureType': "firewall_4.0",
+            'globalConfig': {'tcpTimeoutEstablished': 7200},
             'firewallRules': {
                 'firewallRules': vcns_rules}}