support for multiple permissions for cassandra_grant

[mysolo]

simply loop for permissions list. and correct except python 3 compatibility.

[Dudesons]

Hi @mysolo

I'm not totally agree with your PR.

I'm ok this commit f0c40c5

But this is not in the ansible philosophy to implement loop in actions, you have to use the dsl to do your loop.

- name: grant perms to roles
  cassandra_grant:
    role: "{{ item.role_name }}"
    permission: "{{ item.permission }}" # permission available ["all", "alter", "drop", "select", "modify", "authorise", "describe", "execute"]
    keyspaces: "{{ item.keyspaces }}"
    all_keyspaces: false
  with_items: "{{ my_cassandra_permissions }}"

[mysolo]

Hi @Dudesons .

A action is it one permission by one keyspace ? Or one permission by multiple keyspaces.
In cassandra:
grant_permission_statement ::= GRANT permissions ON resource TO role_name.
In cassandra is not possible a grant multiple permission or one permission on multiple keyspace with a one grant command.
For me , a action is GRANT or REVOKE for ONE role. after, I understand can be wrong.

[Dudesons]

@mysolo with this module I create a custom role to manage my user and group (roles).
Also this role permit me to give a permission to multiple keyspace.

        - role_name: dba
          permission: all
          keyspaces:
            - foo
            - bar
        - role_name: account_writer_reader
          permission: select
          keyspaces:
            - foo
        - role_name: account_writer_reader
          permission: modify
          keyspaces:
            - foo