Deployment plan fixes for VM with last host, and last host in maintenance (apache#12062)

* Deployment plan fixes for VM with last host
- Consider last host when it is not in maintenance
- Fail deployment when user requests for last host consideration and last host doesn't exists or in maintenance

* changes

* msg update with vm/host name

* address comments

* Exclude last hosts with error or degraded state as well, for vm deploy

* review changes

Author: sureshanaparti

server/src/main/java/com/cloud/ha/HighAvailabilityManagerImpl.java

@@ -837,7 +837,7 @@ public Long migrate(final HaWorkVO work) {
         if (checkAndCancelWorkIfNeeded(work)) {
             return null;
         }
-        logger.info("Migration attempt: for VM {}from host {}. Starting attempt: {}/{} times.", vm, srcHost, 1 + work.getTimesTried(), _maxRetries);
+        logger.info("Migration attempt: for {} from {}. Starting attempt: {}/{} times.", vm, srcHost, 1 + work.getTimesTried(), _maxRetries);
 
         if (VirtualMachine.State.Stopped.equals(vm.getState())) {
             logger.info(String.format("vm %s is Stopped, skipping migrate.", vm));
@@ -847,8 +847,6 @@ public Long migrate(final HaWorkVO work) {
             logger.info(String.format("VM %s is running on a different host %s, skipping migration", vm, vm.getHostId()));
             return null;
         }
-        logger.info("Migration attempt: for VM " + vm.getUuid() + "from host id " + srcHostId +
-                ". Starting attempt: " + (1 + work.getTimesTried()) + "/" + _maxRetries + " times.");
 
         try {
             work.setStep(Step.Migrating);

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

@@ -1563,7 +1563,7 @@ private boolean doMaintain(final long hostId) {
                         throw new CloudRuntimeException("There are active VMs using the host's local storage pool. Please stop all VMs on this host that use local storage.");
                     }
                 } else {
-                    logger.info("Maintenance: scheduling migration of VM {} from host {}", vm, host);
+                    logger.info("Maintenance: scheduling migration of {} from {}", vm, host);
                     _haMgr.scheduleMigration(vm, HighAvailabilityManager.ReasonType.HostMaintenance);
                 }
             }