<!--- Verify first that your feature was not already discussed on GitHub -->
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##### SUMMARY
<!--- Describe the new feature/improvement briefly below -->
azure_rm_galleryimageversion_module should be able to take data disk snapshots as input.

##### ISSUE TYPE
- Feature Idea

##### COMPONENT NAME
<!--- Write the short name of the module, plugin, task or feature below, use your best guess if unsure -->
azure_rm_galleryimageversion_module

##### ADDITIONAL INFORMATION
<!--- Describe how the feature would be used, why it is needed and what it would solve -->
Starting from SIG api version 2019-07-01, we support creating image version from snapshots, which contains 1 os disk snapshot and 0 to many data disk snapshots. By having this feature, it give customers full power to create image version from snapshots.

Here is a sample request entity:
{"name":"1.0.0","location":"West US","properties":{"publishingProfile":{"excludeFromLatest":false},"storageProfile":{"osDiskImage":{"source":{"id":"/subscriptions/<subId>/resourceGroups/rgName/providers/Microsoft.Compute/snapshots/osSnapshotName"}},"dataDiskImages":[{"lun":0,"source":{"id":"/subscriptions/<subId>/resourceGroups/rg/providers/Microsoft.Compute/snapshots/datadiskSnapshot1"}}]}}}

So for data disk, user needs to provide "lun" and "source".

<!--- Paste example playbooks or commands between quotes below -->
```yaml

```

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

type: str
    state:
        description:
            - Assert the state of the GalleryImageVersion.
            - Use C(present) to create or update an GalleryImageVersion and C(absent) to delete it.
        default: present
        choices:
            - absent
            - present
        type: str
extends_documentation_fragment:
    - azure
    - azure_tags
author:
    - Zim Kalinowski (@zikalino)
'''
EXAMPLES = '''
- name: Create or update a simple gallery Image Version.
  azure_rm_galleryimageversion:
    resource_group: myResourceGroup
    gallery_name: myGallery1283
    gallery_image_name: myImage
    name: 10.1.3
    location: West US
    publishing_profile:
      end_of_life_date: "2020-10-01t00:00:00+00:00"
      exclude_from_latest: yes
      replica_count: 3
      storage_account_type: Standard_LRS
      target_regions: