##### 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 not image_reference:
                        self.fail("Parameter error: an image is required when creating a virtual machine.")
                    availability_set_resource = None
                    if self.availability_set:
                        parsed_availability_set = parse_resource_id(self.availability_set)
                        availability_set = self.get_availability_set(parsed_availability_set.get('resource_group', self.resource_group),
                                                                     parsed_availability_set.get('name'))
                        availability_set_resource = self.compute_models.SubResource(id=availability_set.id)
                        if self.zones:
                            self.fail("Parameter error: you can't use Availability Set and Availability Zones at the same time")
                    
                    if not self.network_interface_names:
                        default_nic = self.create_default_nic()
                        self.log("network interface:")
                        self.log(self.serialize_obj(default_nic, 'NetworkInterface'), pretty_print=True)
                        network_interfaces = [default_nic.id]
                    
                    if not self.storage_account_name and not self.managed_disk_type:
                        storage_account = self.create_default_storage_account()
                        self.log("os disk storage account:")
                        self.log(self.serialize_obj(storage_account, 'StorageAccount'), pretty_print=True)
                        requested_storage_uri = 'https://{0}.blob.{1}/'.format(
                            storage_account.name,
                            self._cloud_environment.suffixes.storage_endpoint)
                        requested_vhd_uri = '{0}{1}/{2}'.format(
                            requested_storage_uri,
                            self.storage_container_name,
                            self.storage_blob_name)
                    
                    if not self.os_disk_caching: