Add stdin ("-") to the command-line arguments of ansible-lint >=5.0.0

[jamescherti]

Ansible-lint version >=5.0.0 ignores the standard input when "-" or "/dev/stdin" is not explicitly specified in the arguments:

:ALEInfo
(finished - exit code 0) ['/bin/bash', '-c', ''ansible-lint'' --parseable-severity -x yaml < ''/tmp/vVyvn4B/7/test2.yml'']
<<<NO OUTPUT RETURNED>>>'

This commit adds "-" to the arguments of ansible-lint version >=5.0.0 (file: ale_linters/ansible/ansible_lint.vim).

Steps to reproduce the bug:

Tested with: ansible-lint 5.0.12 using ansible 2.11.2

Create the file "test.yml":

- hosts: localhost
  gather_facts: no
  tasks:
    - name: "Shell test"
      shell: "ls /"

Execute "ansible-lint" without "-" (result: no output):

$ ansible-lint --parseable-severity -x yaml < test.yml

Execute "ansible-lint" with "-" (result: the errors are displayed):

$ ansible-lint --parseable-severity -x yaml - < test.yml
WARNING  Listing 1 violation(s) that are fatal
stdin:1: [internal-error] [VERY_HIGH] Unexpected error code 1 from execution of: ansible-playbook --syntax-check /tmp/tmp939mrvbkplaybook.yml
You can skip specific rules or tags by adding them to your configuration file:
# .ansible-lint
warn_list:  # or 'skip_list' to silence them completely
  - internal-error  # Unexpected internal error

Finished with 1 failure(s), 0 warning(s) on 1 files.

[hsanson]

Tests need to be updated too.

[jamescherti]

@hsanson @maxwell-k I have updated the tests.

[hsanson]

Thanks for the changes.