Bypass query params to GET requests for collections

[sharshenov]

Adds support for pagination and other query parameters for all collection endpoints.

Example:

client = RabbitMQ::HTTP::Client.new("http://localhost:15672/")
client.list_queues('my_vhost', page: 2, page_size: 2)

# for default vhost
client.list_queues(nil, page: 2, page_size: 2)

[michaelklishin]

Thank you!