ACTIVEMQ6-3 renaming directories from activemq6 to activemq

https://issues.apache.org/jira/browse/ACTIVEMQ6-3

We are renaming packages from activemq6 to activemq as that's more generic and version independent
On this first commit I'm just renaming the directories otherwise the history would be lost. The next commit will rename the text on the directories.
If I squash these two commits git will make us delete / add again.

activemq-commons/src/main/java/org/apache/activemq/core/server/HornetQComponent.java

@@ -1,31 +1,31 @@
-/*
- * Copyright 2005-2014 Red Hat, Inc.
- * Red Hat licenses this file to you under the Apache License, version
- * 2.0 (the "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *    http://www.apache.org/licenses/LICENSE-2.0
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
- * implied.  See the License for the specific language governing
- * permissions and limitations under the License.
- */
-
-package org.apache.activemq6.core.server;
-
-/**
- * A HornetQComponent
- *
- * @author <a href="mailto:tim.fox@jboss.com">Tim Fox</a>
- * @version <tt>$Revision: 2796 $</tt>
- *
- *
- */
-public interface HornetQComponent
-{
-   void start() throws Exception;
-
-   void stop() throws Exception;
-
-   boolean isStarted();
-}
+/*
+ * Copyright 2005-2014 Red Hat, Inc.
+ * Red Hat licenses this file to you under the Apache License, version
+ * 2.0 (the "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ * implied.  See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+package org.apache.activemq6.core.server;
+
+/**
+ * A HornetQComponent
+ *
+ * @author <a href="mailto:tim.fox@jboss.com">Tim Fox</a>
+ * @version <tt>$Revision: 2796 $</tt>
+ *
+ *
+ */
+public interface HornetQComponent
+{
+   void start() throws Exception;
+
+   void stop() throws Exception;
+
+   boolean isStarted();
+}