update Default dvSwitch description

Author: saklar13

shell-definition.yaml

@@ -90,7 +90,7 @@ node_types:
         description: "The datacenter within the vCenter that will be used for VM deployment. All other settings of this vCenter resource should refer to entities associated with this datacenter."
       Default dvSwitch:
         type: string
-        description: "The default vCenter vSwitch or dvSwitch that will be used when configuring VM connectivity. Should be under the Default Datacenter."
+        description: "The default vCenter vSwitch or dvSwitch that will be used when configuring VM connectivity. Should be under the Default Datacenter. For proper vSwitch connectivity every host in the cluster should have a vSwitch with the same name."
       Holding Network:
         type: string
         description: "The default network that will be configured when disconnecting from another network. Should be under the Default Datacenter."