##### 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 }}"
```

vm_dict = None
        image_reference = None
        custom_image = False
        resource_group = self.get_resource_group(self.resource_group)
        if not self.location:
            
            self.location = resource_group.location
        self.location = normalize_location_name(self.location)
        if self.state == 'present':
            
            if self.vm_size and not self.vm_size_is_valid():
                self.fail("Parameter error: vm_size {0} is not valid for your subscription and location.".format(
                    self.vm_size
                ))
            if self.network_interface_names:
                for nic_name in self.network_interface_names:
                    nic = self.parse_network_interface(nic_name)
                    network_interfaces.append(nic)
            if self.ssh_public_keys:
                msg = "Parameter error: expecting ssh_public_keys to be a list of type dict where " \
                    "each dict contains keys: path, key_data."
                for key in self.ssh_public_keys:
                    if not isinstance(key, dict):
                        self.fail(msg)
                    if not key.get('path') or not key.get('key_data'):
                        self.fail(msg)
            if self.image and isinstance(self.image, dict):
                if all(key in self.image for key in ('publisher', 'offer', 'sku', 'version')):
                    marketplace_image = self.get_marketplace_image_version()
                    if self.image['version'] == 'latest':