MB-8194 make sure that we understand xdcr checkpoint requests
MB-8194 make sure that we understand xdcr checkpoint requests

... from older clusters. older clusters won't be able to parse
bucket name correctly from our couchApiBase url, so they will
send us bucketname+uuid and we need to parse uuid out on our end

Change-Id: I5838e0d73124cacf30cedc4874406777fda75914
Reviewed-on: http://review.couchbase.org/37946
Tested-by: Artem Stemkovski <15a0730a27c69f62ab86f2b6c639fca202166c02@couchbase.com>
Reviewed-by: Aliaksey Kandratsenka <340b8e09ca65cd3fc686427fcfed17e87eaf61e2@gmail.com>

mschoch/ns_server,membase/ns_server,t3rm1n4l/ns_server,nimishzynga/ns_server,t3rm1n4l/ns_server,ceejatec/ns_server,nimishzynga/ns_server,nimishzynga/ns_server,t3rm1n4l/ns_server,t3rm1n4l/ns_server,mschoch/ns_server,mschoch/ns_server,ceejatec/ns_server,mschoch/ns_server,membase/ns_server,mschoch/ns_server,nimishzynga/ns_server,mschoch/ns_server,membase/ns_server,ceejatec/ns_server,membase/ns_server,t3rm1n4l/ns_server,nimishzynga/ns_server,ceejatec/ns_server,nimishzynga/ns_server,membase/ns_server,membase/ns_server,ceejatec/ns_server,ceejatec/ns_server