Update simulator investigator

Author: sureshanaparti

api/src/main/java/com/cloud/ha/Investigator.java

@@ -26,9 +26,16 @@ public interface Investigator extends Adapter {
      * Returns if the vm is still alive.
      *
      * @param vm to work on.
+     * @return true if vm is alive, otherwise false
      */
     boolean isVmAlive(VirtualMachine vm, Host host) throws UnknownVM;
 
+    /**
+     * Returns the agent status of the host.
+     *
+     * @param host
+     * @return status of the host agent
+     */
     Status getHostAgentStatus(Host host);
 
     class UnknownVM extends Exception {

plugins/hypervisors/simulator/src/main/java/com/cloud/ha/SimulatorInvestigator.java

@@ -54,7 +54,7 @@ protected SimulatorInvestigator() {
     }
 
     @Override
-    public Status isAgentAlive(Host agent) {
+    public Status getHostAgentStatus(Host agent) {
         if (agent.getHypervisorType() != HypervisorType.Simulator) {
             return null;
         }