In this change 'use_router_proxy' option was added
to switch between direct connections and proxy.
Proxy was reimplemented and splitted onto two
types of proxies:
* PUBLISHER proxy for fanout pattern
* ROUTER proxy for direct messaging
Each type of proxy is configured over command line
argument --type.
Deployment guide was updated accordingly to the change.
Change-Id: If36e9c26e2a8ebe622cfa7e9f2a07b1a69aabe34
Closes-Bug: #1555007