Adding back function that was removed when rerunning protobuf

rpc/cloudagent/network/moc_cloudagent_networkinterface.go

@@ -0,0 +1,12 @@
+package network
+
+func (m *NetworkInterface) GetPrimaryIpConfiguration() *IpConfiguration {
+	if m != nil {
+		for _, ipConfig := range m.IpConfigurations {
+			if ipConfig.Primary {
+				return ipConfig
+			}
+		}
+	}
+	return nil
+}