Shuffle RESTful URL's around.

This patch moves the RESTful URL's around to more appropriate
locations for release.

The /stasis URL's are moved to /ari, since Asterisk REST Interface was
a more appropriate name than Stasis-HTTP. (Most of the code still has
stasis_http references, but they will be cleaned up after there are no
more outstanding branches that would have merge conflicts with such a
change).

A larger change was moving the ARI events WebSocket off of the shared
/ws URL to its permanent home on /ari/events. The Swagger code
generator was extended to handle "upgrade: websocket" and
"websocketProtocol:" attributes on an operation.

The WebSocket module was modified to better handle WebSocket servers
that have a single registered protocol handler. If a client
connections does not specify the Sec-WebSocket-Protocol header, and
the server has a single protocol handler registered, the WebSocket
server will go ahead and accept the client for that subprotocol.

(closes issue ASTERISK-21857)
Review: https://reviewboard.asterisk.org/r/2621/



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@393528 65c4cc65-6c06-0410-ace0-fbb531ad65f3

rest-api-templates/asterisk_processor.py

@@ -144,6 +144,7 @@ class AsteriskProcessor(SwaggerPostProcessor):
                 segment = resource_api.root_path.get_child(api.path.split('/'))
                 for operation in api.operations:
                     segment.operations.append(operation)
+                api.full_name = segment.full_name
             resource_api.api_declaration.has_events = False
             for model in resource_api.api_declaration.models:
                 if model.id == "Event":