##### SUMMARY
When you try to generalize a vm with availability zones defined in it, zone info is not preserved and must be passed on.

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
azure_rm_virtualmachine

##### ANSIBLE VERSION
<!--- Paste verbatim output from "ansible --version" between quotes -->
```paste below
ansible 2.9.0
  config file = /etc/ansible/ansible.cfg
  configured module search path = [ u'/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/local/lib/python2.7/dist-packages/ansible
  executable location = /usr/local/bin/ansible
  python version = 2.7.12 (default, Oct  8 2019, 14:14:10) [GCC 5.4.0 20160609]
```

##### CONFIGURATION
<!--- Paste verbatim output from "ansible-config dump --only-changed" between quotes -->
```paste below

```

##### OS / ENVIRONMENT
<!--- Provide all relevant information below, e.g. target OS versions, network device firmware, etc. -->


##### STEPS TO REPRODUCE
<!--- Describe exactly how to reproduce the problem, using a minimal test-case -->
When you try to generalize a vm with availability zones defined in it, zone info is not preserved and must be passed on.

 Furthermore zone information it’s not returned by azure_rm_virtualmachine_info so it has to be gathered with azure_rm_resource_info in order to be able to generalize the vm

<!--- Paste example playbooks or commands between quotes below -->
```yaml
- name: Generalize VM
  azure_rm_virtualmachine:
    resource_group: "{{ resourcegroup }}"
    name: "{{ vm }}"
    os_type: "{{ os_type | default(omit) }}"
    generalized: yes
    state: present 

```

<!--- HINT: You can paste gist.github.com links for larger files -->

##### EXPECTED RESULTS
<!--- Describe what you expected to happen when running the steps above -->
Generalized VM

##### ACTUAL RESULTS
<!--- Describe what actually happened. If possible run with extra verbosity (-vvvv) -->
<!--- Paste verbatim command output between quotes -->
```paste below
    "msg": "You can't change the Availability Zone of a virtual machine (have: [<zone>], want: None)"

```
##### WORKAROUND
In order to be able to generalize the VM the following code should be used.

```yaml
- name: Get VM Availability Zone
  azure_rm_resource_info:
    resource_group: "{{ resourcegroup }}"
    resource_name: "{{ vm }}"
    resource_type: VirtualMachines 
    provider: Compute
  register: result

- name: Generalize VM
  azure_rm_virtualmachine:
    resource_group: "{{ resourcegroup }}"
    name: "{{ vm }}"
    os_type: "{{ os_type | default(omit) }}"
    generalized: yes
    state: present
    zones: "{{ result.response[0].zones }}"
```

)
                    
                    if vm_dict['properties']['storageProfile'].get('dataDisks'):
                        data_disks = []
                        for data_disk in vm_dict['properties']['storageProfile']['dataDisks']:
                            if data_disk.get('managedDisk'):
                                managed_disk_type = data_disk['managedDisk'].get('storageAccountType')
                                data_disk_managed_disk = self.compute_models.ManagedDiskParameters(storage_account_type=managed_disk_type)
                                data_disk_vhd = None
                            else:
                                data_disk_vhd = data_disk['vhd']['uri']
                                data_disk_managed_disk = None
                            data_disks.append(self.compute_models.DataDisk(
                                lun=int(data_disk['lun']),
                                name=data_disk.get('name'),
                                vhd=data_disk_vhd,
                                caching=data_disk.get('caching'),
                                create_option=data_disk.get('createOption'),
                                disk_size_gb=int(data_disk['diskSizeGB']),
                                managed_disk=data_disk_managed_disk,
                            ))
                        vm_resource.storage_profile.data_disks = data_disks
                    self.log("Update virtual machine with parameters:")
                    self.create_or_update_vm(vm_resource, False)
                
                if (powerstate_change == 'poweron' and
                        self.results['ansible_facts']['azure_vm']['powerstate'] != 'running'):
                    
                    self.power_on_vm()
                elif (powerstate_change == 'poweroff' and