Add check support for: bridge, ipvlan, macvlan, p2p, vlan and host-device main plugins

host-local and static ipam plugins
  tuning, bandwidth and portmap meta plugins

  Utility functions created for common PrevResult checking

  Fix windows build

pkg/ipam/ipam.go

@@ -24,6 +24,10 @@ func ExecAdd(plugin string, netconf []byte) (types.Result, error) {
 	return invoke.DelegateAdd(context.TODO(), plugin, netconf, nil)
 }
 
+func ExecCheck(plugin string, netconf []byte) error {
+	return invoke.DelegateCheck(context.TODO(), plugin, netconf, nil)
+}
+
 func ExecDel(plugin string, netconf []byte) error {
 	return invoke.DelegateDel(context.TODO(), plugin, netconf, nil)
 }