missing imports from merge forward

Author: Daan Hoogland

api/src/main/java/org/apache/cloudstack/api/command/user/userdata/RegisterUserDataCmd.java

@@ -21,6 +21,8 @@
 import org.apache.cloudstack.api.ApiConstants;
 import org.apache.cloudstack.api.Parameter;
 import org.apache.cloudstack.api.ServerApiException;
+import org.apache.cloudstack.api.response.DomainResponse;
+import org.apache.cloudstack.api.response.ProjectResponse;
 import org.apache.cloudstack.api.response.SuccessResponse;
 import org.apache.cloudstack.api.response.UserDataResponse;
 import org.apache.cloudstack.context.CallContext;