##### 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 }}"
```

vhd = self.compute_models.VirtualHardDisk(uri=vm_dict['properties']['storageProfile']['osDisk'].get('vhd', {}).get('uri'))
                    else:
                        vhd = None
                        managed_disk = self.compute_models.ManagedDiskParameters(
                            storage_account_type=vm_dict['properties']['storageProfile']['osDisk']['managedDisk'].get('storageAccountType')
                        )
                    availability_set_resource = None
                    try:
                        availability_set_resource = self.compute_models.SubResource(id=vm_dict['properties']['availabilitySet'].get('id'))
                    except Exception:
                        
                        pass
                    if 'imageReference' in vm_dict['properties']['storageProfile'].keys():
                        if 'id' in vm_dict['properties']['storageProfile']['imageReference'].keys():
                            image_reference = self.compute_models.ImageReference(
                                id=vm_dict['properties']['storageProfile']['imageReference']['id']
                            )
                        else:
                            image_reference = self.compute_models.ImageReference(
                                publisher=vm_dict['properties']['storageProfile']['imageReference'].get('publisher'),
                                offer=vm_dict['properties']['storageProfile']['imageReference'].get('offer'),
                                sku=vm_dict['properties']['storageProfile']['imageReference'].get('sku'),
                                version=vm_dict['properties']['storageProfile']['imageReference'].get('version')
                            )
                    else:
                        image_reference = None
                    
                    if vm_dict['zones'] != self.zones:
                        self.fail("You can't change the Availability Zone of a virtual machine (have: {0}, want: {1})".format(vm_dict['zones'], self.zones))
                    if 'osProfile' in vm_dict['properties']: