GroupImpl.validate() always validates instances of Group since they may contain other options that need validating

git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/cli/trunk@130100 13f79535-47bb-0310-9956-ffa450edef68

Author: Robert James Oxspring

src/java/org/apache/commons/cli2/option/GroupImpl.java

@@ -227,6 +227,9 @@ public void validate(final WriteableCommandLine commandLine)
             if(option.isRequired()){
                 option.validate(commandLine);
             }
+            if(option instanceof Group){
+            	option.validate(commandLine);
+            }
             // if the child option is present then validate it
             if (commandLine.hasOption(option)) {
                 if (++present > maximum) {