Auto complete when listing groups type. Fixed identation when listing buckets.

Change-Id: I10415fc0a9f0f2f75b287c49d315588869ca535b
diff --git a/cli/src/main/java/org/onosproject/cli/net/GroupTypeCompleter.java b/cli/src/main/java/org/onosproject/cli/net/GroupTypeCompleter.java
new file mode 100644
index 0000000..5eb567a
--- /dev/null
+++ b/cli/src/main/java/org/onosproject/cli/net/GroupTypeCompleter.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+ *
+ * Licensed 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.onosproject.cli.net;
+
+import com.google.common.collect.Lists;
+import org.onosproject.cli.AbstractChoicesCompleter;
+import org.onosproject.net.group.Group;
+
+import java.util.List;
+
+/**
+ * Group status completer.
+ */
+public class GroupTypeCompleter extends AbstractChoicesCompleter {
+    @Override
+    protected List<String> choices() {
+        List<String> strings = Lists.newArrayList();
+        for (Group.Type groupType : Group.Type.values()) {
+            strings.add(groupType.toString().toLowerCase());
+        }
+        strings.add(GroupsListCommand.ANY);
+        return strings;
+    }
+}
diff --git a/cli/src/main/java/org/onosproject/cli/net/GroupsListCommand.java b/cli/src/main/java/org/onosproject/cli/net/GroupsListCommand.java
index 2fc5461..4a58061 100644
--- a/cli/src/main/java/org/onosproject/cli/net/GroupsListCommand.java
+++ b/cli/src/main/java/org/onosproject/cli/net/GroupsListCommand.java
@@ -52,7 +52,7 @@
     private static final String FORMAT =
             "   id=0x%s, state=%s, type=%s, bytes=%s, packets=%s, appId=%s, referenceCount=%s";
     private static final String BUCKET_FORMAT =
-            "   id=0x%s, bucket=%s, bytes=%s, packets=%s, actions=%s";
+            "       id=0x%s, bucket=%s, bytes=%s, packets=%s, actions=%s";
 
     @Argument(index = 1, name = "uri", description = "Device ID",
             required = false, multiValued = false)
@@ -133,7 +133,7 @@
             groups.sort(Comparators.GROUP_COMPARATOR);
             sortedGroups.put(d, groups);
         }
-        if (type != null) {
+        if (type != null && !"any".equals(type))  {
             for (Device device : sortedGroups.keySet()) {
                 sortedGroups.put(device, sortedGroups.get(device).stream()
                         .filter(group -> GroupDescription.Type.valueOf(type.toUpperCase()).equals(group.type()))
diff --git a/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml b/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml
index 27e2b4f..1ffeed4 100644
--- a/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml
+++ b/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml
@@ -513,8 +513,10 @@
             <completers>
                 <ref component-id="groupStatusCompleter"/>
                 <ref component-id="deviceIdCompleter"/>
-                <null/>
             </completers>
+            <optional-completers>
+                <entry key="-t" value-ref="groupTypeCompleter"/>
+            </optional-completers>
         </command>
 
         <command>
@@ -929,6 +931,7 @@
     <bean id="intentIdCompleter" class="org.onosproject.cli.net.completer.IntentIdCompleter"/>
     <bean id="flowRuleStatusCompleter" class="org.onosproject.cli.net.FlowRuleStatusCompleter"/>
     <bean id="groupStatusCompleter" class="org.onosproject.cli.net.GroupStatusCompleter" />
+    <bean id="groupTypeCompleter" class="org.onosproject.cli.net.GroupTypeCompleter" />
     <bean id="connectPointCompleter" class="org.onosproject.cli.net.ConnectPointCompleter"/>
     <bean id="nullCompleter" class="org.apache.karaf.shell.console.completer.NullCompleter"/>
     <bean id="ethTypeCompleter" class="org.onosproject.cli.net.EthTypeCompleter"/>