APIMbeanServer: Show column family in jconsole

The nodetool looks for column family with by their name. When using
JConsole, it search for all MBeans.

This patch adds a check for column family and stream with null query
(wild card).

This way the column family will appear in the JConsole.

Fixes #35

Signed-off-by: Amnon Heiman <amnon@scylladb.com>
Message-Id: <1479227289-15031-1-git-send-email-amnon@scylladb.com>

src/main/java/com/scylladb/jmx/utils/APIMBeanServer.java

@@ -78,6 +78,8 @@ public class APIMBeanServer extends ChainedMBeanServer {
     @Override
     public Set<ObjectName> queryNames(ObjectName name, QueryExp query) {
         if (name == null) {
+            ColumnFamilyStore.checkRegistration();
+            StreamingMetrics.checkRegistration();
             return super.queryNames(name, query);
         }
         if (name.getCanonicalKeyPropertyListString()