Making possible to update KVM hosts password in the database via the API

- Make sure the doUpdateHostPassword() method returns the result from the answer, not always true
   - Added the LibvirtUpdateHostPasswordCommandWrapper class, which will handle the changes in the KVM agent
     That's will be further implemented in the future. The command will avoid the agent to complain about Unsupported command
   - Added a test to make sure the current implementation of the comment works
     - If changes in the future, it will also require changes. In that way, we make sure nobody will break it

Signed-off-by: wilderrodrigues <wrodrigues@schubergphilis.com>

This closes #527

plugins/hypervisors/kvm/src/com/cloud/hypervisor/kvm/resource/wrapper/LibvirtUpdateHostPasswordCommandWrapper.java

@@ -0,0 +1,35 @@
+//
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF 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 com.cloud.hypervisor.kvm.resource.wrapper;
+
+import com.cloud.agent.api.Answer;
+import com.cloud.agent.api.UpdateHostPasswordCommand;
+import com.cloud.hypervisor.kvm.resource.LibvirtComputingResource;
+import com.cloud.resource.CommandWrapper;
+import com.cloud.resource.ResourceWrapper;
+
+@ResourceWrapper(handles =  UpdateHostPasswordCommand.class)
+public final class LibvirtUpdateHostPasswordCommandWrapper extends CommandWrapper<UpdateHostPasswordCommand, Answer, LibvirtComputingResource> {
+
+    @Override
+    public Answer execute(final UpdateHostPasswordCommand command, final LibvirtComputingResource libvirtComputingResource) {
+        return new Answer(command, true, null);
+    }
+}

plugins/hypervisors/kvm/test/com/cloud/hypervisor/kvm/resource/LibvirtComputingResourceTest.java

@@ -127,6 +127,7 @@ import com.cloud.agent.api.SecurityGroupRulesCmd.IpPortAndProto;
 import com.cloud.agent.api.StartCommand;
 import com.cloud.agent.api.StopCommand;
 import com.cloud.agent.api.UnPlugNicCommand;
+import com.cloud.agent.api.UpdateHostPasswordCommand;
 import com.cloud.agent.api.UpgradeSnapshotCommand;
 import com.cloud.agent.api.VmStatsEntry;
 import com.cloud.agent.api.check.CheckSshCommand;
@@ -5072,4 +5073,18 @@ public class LibvirtComputingResourceTest {
             fail(e.getMessage());
         }
     }
+
+    @Test
+    public void testUpdateHostPasswordCommand() {
+        final String username = "root";
+        final String newPassword = "password";
+        final UpdateHostPasswordCommand command = new UpdateHostPasswordCommand(username, newPassword);
+
+        final LibvirtRequestWrapper wrapper = LibvirtRequestWrapper.getInstance();
+        assertNotNull(wrapper);
+
+        final Answer answer = wrapper.execute(command, libvirtComputingResource);
+
+        assertTrue(answer.getResult());
+    }
 }

server/src/com/cloud/resource/ResourceManagerImpl.java

@@ -2235,7 +2235,7 @@ public class ResourceManagerImpl extends ManagerBase implements ResourceManager,
         final String password = nv.getValue();
         final UpdateHostPasswordCommand cmd = new UpdateHostPasswordCommand(username, password);
         final Answer answer = _agentMgr.easySend(hostId, cmd);
-        return answer != null;
+        return answer.getResult();
     }
 
     @Override