##### SUMMARY
If a module sets `add_file_common_args=True` when calling `AnsibleModule`, all elements from [FILE_COMMON_ARGUMENTS](https://github.com/ansible/ansible/blob/e9d29b1fe4285d90d7a4506b80260a9e24c3bcea/lib/ansible/module_utils/basic.py#L229-L257) are included in the argument spec. The [files document fragment](https://github.com/ansible/ansible/blob/e9d29b1fe4285d90d7a4506b80260a9e24c3bcea/lib/ansible/plugins/doc_fragments/files.py#L15-L80) only documents a subset of them, though. Missing are:
 - src
 - follow
 - force
 - content
 - backup
 - remote_src
 - regexp
 - delimiter
 - directory_mode

Most module authors using `add_file_common_args=True` are probably not aware that their modules have these options as well.

I don't think these extra options should be added by default if `add_file_common_args=True` is specified.

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
lib/ansible/module_utils/basic.py

##### ANSIBLE VERSION
```
devel
```

- C(always) combines C(download) and C(change).
        required: false
        default: 'download'
        choices: ['never', 'download', 'change', 'always']
        version_added: "2.6"
extends_documentation_fragment:
    - files
'''
EXAMPLES = '''
# Download the latest version of the JUnit framework artifact from Maven Central
- maven_artifact:
    group_id: junit
    artifact_id: junit
    dest: /tmp/junit-latest.jar
# Download JUnit 4.11 from Maven Central
- maven_artifact:
    group_id: junit
    artifact_id: junit
    version: 4.11
    dest: /tmp/junit-4.11.jar
# Download an artifact from a private repository requiring authentication
- maven_artifact:
    group_id: com.company
    artifact_id: library-name
    repository_url: 'https://repo.company.com/maven'
    username: user
    password: pass
    dest: /tmp/library-name-latest.jar
# Download a WAR File to the Tomcat webapps directory to be deployed
- maven_artifact: