<!--- Verify first that your issue is not already reported on GitHub -->
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##### SUMMARY
The gitlab_runner module throws deprecation warnings for an option I don't use and another option that is not actually deprecated

##### ISSUE TYPE
- Bug Report

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

##### ANSIBLE VERSION
<!--- Paste verbatim output from "ansible --version" between quotes -->
```
ansible 2.8.3
  config file = /etc/ansible/ansible.cfg
  configured module search path = ['/home/m/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /home/m/.local/lib/python3.6/site-packages/ansible
  executable location = /home/m/.local/bin/ansible
  python version = 3.6.8 (default, Jan 14 2019, 11:02:34) [GCC 8.0.1 20180414 (experimental) [trunk revision 259383]]
```

##### CONFIGURATION
<!--- Paste verbatim output from "ansible-config dump --only-changed" between quotes -->
```paste below
DEFAULT_REMOTE_USER(/etc/ansible/ansible.cfg) = root
HOST_KEY_CHECKING(/etc/ansible/ansible.cfg) = False
```

##### OS / ENVIRONMENT
<!--- Provide all relevant information below, e.g. target OS versions, network device firmware, etc. -->
Target: Debian Buster, freshly installed. Kernel 4.19.0-5-amd64, Python versions 2.7.16 and 3.7.3

##### STEPS TO REPRODUCE
<!--- Describe exactly how to reproduce the problem, using a minimal test-case -->
Create a task using the gitlab_runner module. Here is the task I use:
<!--- Paste example playbooks or commands between quotes below -->
```
m@void:~/work/ansible-default-deployment$ cat roles/gitlab-runner/tasks/main.yml 
---
- name: Install python-gitlab via pip
  pip:
      name: python-gitlab
      state: present

- name: Register runner
  gitlab_runner:
      url: <redacted>
      api_token: "{{ gitlab_api_token }}"
      registration_token: "{{ gitlab_runner_registration_token }}"
      description: "Auto-created runner for project {{ project_name }}"
      state: present
      active: False
      tag_list: ['docker', '{{project_name}}']
      run_untagged: False
      locked: False
```

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

##### EXPECTED RESULTS
<!--- Describe what you expected to happen when running the steps above -->
- I expect no deprecation warning for the `url` parameter because it is described as a required parameter with no possible alternative, and it is not marked as deprecated even in the 'devel' docs
- I expect no deprecation warning for the `login_token`  parameter because I don't use it

##### ACTUAL RESULTS
<!--- Describe what actually happened. If possible run with extra verbosity (-vvvv) -->
This is the output of running the aforenmentioned task:
<!--- Paste verbatim command output between quotes -->
```
TASK [gitlab-runner : Register runner] *************************************************************************************************************************************************************************************************************
[DEPRECATION WARNING]: Param 'url' is deprecated. See the module docs for more information. This feature will be removed in version 2.10. Deprecation warnings can be disabled by setting deprecation_warnings=False in ansible.cfg.
[DEPRECATION WARNING]: Aliases 'login_token' are deprecated. This feature will be removed in version 2.10. Deprecation warnings can be disabled by setting deprecation_warnings=False in ansible.cfg.
changed: [redacted]
```



required: true
    type: str
  email:
    description:
      - The email that belongs to the user.
    required: true
    type: str
  sshkey_name:
    description:
      - The name of the sshkey
    type: str
  sshkey_file:
    description:
      - The ssh key itself.
    type: str
  group:
    description:
      - Id or Full path of parent group in the form of group/name
      - Add user as an member to this group.
    type: str
  access_level:
    description:
      - The access level to the group. One of the following can be used.
      - guest
      - reporter
      - developer
      - master (alias for maintainer)
      - maintainer
      - owner
    default: guest