Allow password keyword to Client

[jammed343]

Also allows to subclasses, including PubsubClient.

Fixes #20

[thefab]

I think it would be better to use "_call()" in the connect() method (instead on "call()").

This test would be useless

[jammed343]

Agreed

[thefab]

can you provide an additional test ?

[thefab]

probably b"OK" would be better (python3 compatibility)

[jammed343]

Agreed

[landscape-bot]

Repository health decreased by 0.06% when pulling a45db8c on jammed343:jammed343-patch-1 into 8480256 on thefab:master.

• 1 new problem was found (including 0 errors and 0 code smells).
• No problems were fixed.

[jammed343]

I have added updates. I tried making some tests for this using requirepass but it has no effect. Although I have manually tested it and it works

[masom]

Sorry to re-open this. Seems like passing the password from a Pool does not work:

        self.pool = tornadis.ClientPool(
            max_size=self.context.config.get(
                'REDIS_TORNADO_STORAGE_POOL_MAX_SIZE',
                -1
            ),
            client_timeout=self.context.config.get(
                'REDIS_TORNADO_STORAGE_CLIENT_TIMEOUT',
                -1
            ),
            port=self.context.config.REDIS_STORAGE_SERVER_PORT,
            host=self.context.config.REDIS_STORAGE_SERVER_HOST,
            # db=self.context.config.REDIS_STORAGE_SERVER_DB,
            password=self.context.config.REDIS_STORAGE_SERVER_PASSWORD
        )

raises:

  File "/Users/martin/dev/os/thumbor-community/redis-tornado/tc_redis_tornado/storages/redis_tornado_storage.py", line 51, in exists
    with (yield self.pool.connected_client()) as client:
  File "/Users/martin/venv/thumbor/lib/python2.7/site-packages/tornado/gen.py", line 870, in run
    value = future.result()
  File "/Users/martin/venv/thumbor/lib/python2.7/site-packages/tornadis/utils.py", line 129, in result
    raise self.exception()
TypeError: __init__() got an unexpected keyword argument 'password'