fix standard-inventory-rpm
    
    Solve dynamic inventory output:
    
        ANSIBLE_INVENTORY=$(test -e inventory && echo inventory || echo /usr/share/ansible/inventory) TEST_SUBJECTS=local ansible-inventory --list
        [WARNING]:  * Failed to parse /usr/share/ansible/inventory/standard-inventory-rpm with script plugin: Invalid data from file, expected dictionary and got:  None
        [WARNING]:  * Failed to parse /usr/share/ansible/inventory/standard-inventory-rpm with yaml plugin: Syntax Error while loading YAML.   mapping values are not allowed in this context  The error appears to have
    been in '/usr/share/ansible/inventory/standard-inventory-rpm': line 37, column 15, but may be elsewhere in the file depending on the exact syntax problem.  The offending line appears to be:   def main(argv):
    ^ here
        [WARNING]:  * Failed to parse /usr/share/ansible/inventory/standard-inventory-rpm with ini plugin: /usr/share/ansible/inventory/standard-inventory-rpm:27: Expected key=value host variable assignment, got:
    argparse
        [WARNING]: Unable to parse /usr/share/ansible/inventory/standard-inventory-rpm as an inventory source
    
    six