Support migrate VM in vmware_guest module

Author: bardielle

changelogs/2081-migrate_vm_in_vmware_guest.yml

@@ -0,0 +1,2 @@
+minor_changes:
+  - vmware_guest - supporting migrate VM if the requested ESXi hostname was updated.

plugins/modules/vmware_guest.py

@@ -3217,16 +3217,27 @@ def reconfigure_vm(self):
             if self.module.check_mode:
                 self.change_applied = True
             else:
-                task = None
-                try:
-                    task = self.current_vm_obj.ReconfigVM_Task(spec=self.configspec)
-                except vim.fault.RestrictedVersion as e:
-                    self.module.fail_json(msg="Failed to reconfigure virtual machine due to"
-                                              " product versioning restrictions: %s" % to_native(e.msg))
+                task = self.current_vm_obj.ReconfigVM_Task(spec=self.configspec)
                 self.wait_for_task(task)
                 if task.info.state == 'error':
                     return {'changed': self.change_applied, 'failed': True, 'msg': task.info.error.msg, 'op': 'reconfig'}
 
+        # Migrate VM:
+        current_host = self.current_vm_obj.summary.runtime.host
+        requested_host = self.cache.get_esx_host(self.params['esxi_hostname']) if self.params[
+            'esxi_hostname'] else None
+        if requested_host and current_host != requested_host:
+            task = None
+            try:
+                task = self.current_vm_obj.MigrateVM_Task(self.get_resource_pool(), requested_host, "defaultPriority")
+            except vim.fault.RestrictedVersion as e:
+                self.module.fail_json(msg="Failed to reconfigure virtual machine due to"
+                                          " product versioning restrictions: %s" % to_native(e.msg))
+            self.wait_for_task(task)
+            if task.info.state == 'error':
+                return {'changed': self.change_applied, 'failed': True, 'msg': task.info.error.msg,
+                        'op': 'reconfig'}
+
         # Rename VM
         if self.params['uuid'] and self.params['name'] and self.params['name'] != self.current_vm_obj.config.name:
             self.tracked_changes['name'] = self.params['name']