update context to scan system commands

samples/helloworld/src/main/java/org/springframework/shell/samples/helloworld/HelloWorldPlugin.java

@@ -4,9 +4,7 @@ import org.springframework.context.annotation.ComponentScan;
 import org.springframework.context.annotation.Configuration;
 
 @Configuration
-@ComponentScan({"org.springframework.shell.commands", 
-				"org.springframework.shell.converters",
-				"org.springframework.shell.samples.helloworld.commands"})
+@ComponentScan({"org.springframework.shell.samples.helloworld.commands"})
 public class HelloWorldPlugin {
 	
 

src/main/java/org/springframework/shell/Bootstrap.java

@@ -157,7 +157,8 @@ public class Bootstrap {
 				}
 			}
 		}
-		//annctx.scan("org.springframework.shell");
+		annctx.scan("org.springframework.shell.commands");
+		annctx.scan("org.springframework.shell.converters");
 		annctx.refresh();
 		ctx = annctx;
 	}