OvsDpdkMemoryChannels parameter default value

This change is to update the memory channels parameter default
value in service yaml instead of environment yaml file.

Change-Id: Ia0a79b5dc3aa060b91d68e0d23cb1fb5b33eb020
Closes-Bug: #1741234

environments/neutron-ovs-dpdk.yaml

@@ -8,7 +8,6 @@ parameter_defaults:
   NeutronVhostuserSocketDir: "/var/lib/vhost_sockets"
   NovaSchedulerDefaultFilters: "RamFilter,ComputeFilter,AvailabilityZoneFilter,ComputeCapabilitiesFilter,ImagePropertiesFilter,NUMATopologyFilter"
   OvsDpdkDriverType: "vfio-pci"
-  OvsDpdkMemoryChannels: "4"
 
   #ComputeOvsDpdkParameters:
     ## Host configuration Parameters

extraconfig/pre_network/host_config_and_reboot.yaml

@@ -35,7 +35,7 @@ parameters:
     type: string
     constraints:
       - allowed_pattern: "[0-9]*"
-    default: ""
+    default: "4"
     tags:
       - role_specific
   OvsDpdkSocketMemory:

puppet/services/openvswitch.yaml

@@ -45,7 +45,7 @@ parameters:
     type: string
     constraints:
       - allowed_pattern: "[0-9]*"
-    default: ""
+    default: "4"
     tags:
       - role_specific
   OvsDpdkSocketMemory: