Fix reported AIX filesystem module incorrect fail_json() usage

[mator]

SUMMARY

Fix reported AIX filesystem module incorrect fail_json() usage and extend reporting on an error.

Fixes #58609

ISSUE TYPE

• Bugfix Pull Request

COMPONENT NAME

aix_filesystem

ADDITIONAL INFORMATION

$ ansible aix7 -m aix_filesystem -a "filesystem=/mnt/exp1 state=mounted"  
An exception occurred during task execution. To see the full traceback, use -vvv. The error was: TypeError: fail_json() takes exactly 1 argument (4 given)
aix7 | FAILED! => {
    "ansible_facts": {
        "discovered_interpreter_python": "/usr/bin/python"
    }, 
    "changed": false, 
    "module_stderr": "Shared connection to aix7 closed.\r\n", 
    "module_stdout": "Traceback (most recent call last):\r\n  File \"/.ansible/tmp/ansible-tmp-1562092525.37-233239812793604/AnsiballZ_aix_filesystem.py\", line 125, in <module>\r\n    _ansiballz_main()\r\n  File \"/.ansible/tmp/ansible-tmp-1562092525.37-233239812793604/AnsiballZ_aix_filesystem.py\", line 117, in _ansiballz_main\r\n    invoke_module(zipped_mod, temp_path, ANSIBALLZ_PARAMS)\r\n  File \"/.ansible/tmp/ansible-tmp-1562092525.37-233239812793604/AnsiballZ_aix_filesystem.py\", line 54, in invoke_module\r\n    imp.load_module('__main__', mod, module, MOD_DESC)\r\n  File \"/tmp/ansible_aix_filesystem_payload_bQ1ysS/__main__.py\", line 579, in <module>\r\n  File \"/tmp/ansible_aix_filesystem_payload_bQ1ysS/__main__.py\", line 561, in main\r\n  File \"/tmp/ansible_aix_filesystem_payload_bQ1ysS/__main__.py\", line 430, in mount_fs\r\nTypeError: fail_json() takes exactly 1 argument (4 given)\r\n", 
    "msg": "MODULE FAILURE\nSee stdout/stderr for the exact error", 
    "rc": 1
}

after:

$ ansible aix7 -m aix_filesystem -a "filesystem=/mnt/exp1 state=mounted"
aix7 | FAILED! => {
    "ansible_facts": {
        "discovered_interpreter_python": "/usr/bin/python"
    }, 
    "changed": false, 
    "msg": "Failed to run mount. Error message: mount: 0506-334 /mnt/exp1 is not a known file system.\n"
}


$ ansible aix7 -m aix_filesystem -a "filesystem=/mnt/exp1 state=present"
aix7 | FAILED! => {
    "ansible_facts": {
        "discovered_interpreter_python": "/usr/bin/python"
    }, 
    "changed": false, 
    "msg": "Required parameter \"device\" and/or \"vg\" is missing for filesystem creation."
}

[ansibot]

The test ansible-test sanity --test pep8 [explain] failed with 1 error:

lib/ansible/modules/system/aix_filesystem.py:367:21: E126 continuation line over-indented for hanging indent

The test ansible-test sanity --test validate-modules [explain] failed with 1 error:

lib/ansible/modules/system/aix_filesystem.py:8:0: E106 Import found before documentation variables. All imports must appear below DOCUMENTATION/EXAMPLES/RETURN/ANSIBLE_METADATA.

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[ansibot]

cc @MorrisA @bcoca @dagwieers @flynn1973 @gforster @kairoaraujo @marvin-sinister @molekuul @ramooncamacho @wtcross
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[ansibot]

cc @d-little
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[d-little]

LGTM