Fixed a bug in CLI where the state of command executions may interfere with each other.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@18852 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/cli/CLICommand.java

@@ -186,8 +186,10 @@ public abstract class CLICommand implements ExtensionPoint, Cloneable {
         for (CLICommand cmd : all()) {
             if(name.equals(cmd.getName())) {
                 try {
-                    return (CLICommand)cmd.clone();
-                } catch (CloneNotSupportedException e) {
+                    return cmd.getClass().newInstance();
+                } catch (IllegalAccessException e) {
+                    throw new AssertionError(e);
+                } catch (InstantiationException e) {
                     throw new AssertionError(e);
                 }
             }