##### 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_resource.storage_profile.data_disks = data_disks
                    
                    if self.accept_terms is True:
                        if not self.plan or not all([self.plan.get('name'), self.plan.get('product'), self.plan.get('publisher')]):
                            self.fail("parameter error: plan must be specified and include name, product, and publisher")
                        try:
                            plan_name = self.plan.get('name')
                            plan_product = self.plan.get('product')
                            plan_publisher = self.plan.get('publisher')
                            term = self.marketplace_client.marketplace_agreements.get(
                                publisher_id=plan_publisher, offer_id=plan_product, plan_id=plan_name)
                            term.accepted = True
                            self.marketplace_client.marketplace_agreements.create(
                                publisher_id=plan_publisher, offer_id=plan_product, plan_id=plan_name, parameters=term)
                        except Exception as exc:
                            self.fail(("Error accepting terms for virtual machine {0} with plan {1}. " +
                                       "Only service admin/account admin users can purchase images " +
                                       "from the marketplace. - {2}").format(self.name, self.plan, str(exc)))
                    self.log("Create virtual machine with parameters:")
                    self.create_or_update_vm(vm_resource, 'all_autocreated' in self.remove_on_absent)
                elif self.differences and len(self.differences) > 0:
                    
                    self.log("Update virtual machine {0}".format(self.name))
                    self.results['actions'].append('Updated VM {0}'.format(self.name))
                    nics = [self.compute_models.NetworkInterfaceReference(id=interface['id'], primary=(i == 0))
                            for i, interface in enumerate(vm_dict['properties']['networkProfile']['networkInterfaces'])]
                    
                    if not vm_dict['properties']['storageProfile']['osDisk'].get('managedDisk'):
                        managed_disk = None