Allow sqs create FIFO queues

[phstc]

Allow creating FIFO queues via CLI.

For creating FIFO queues using the SDK, besides passing the extension .fifo, it's required to set the attribute FifoQueue: true, otherwise it fails.

This fix auto set FifoQueue: truewhen the queue name ends with .fifo, and besides that, it also add supports for passing custom attributes for creating queues.

shoryuken sqs create  test4.fifo -a=DelaySeconds:30 VisibilityTimeout:600