MB-12216
XDCR@next release - simplified end-to-end test with kvfeed, router and
xmem
Merge branch 'master' of
https://github.com/Xiaomei-Zhang/couchbase_goxdcr_impl

Conflicts:
	factory/xdcr_factory.go
	metadata_svc/cluster_info_svc.go
	parts/router.go
	replication_manager/adminport.go
	replication_manager/replication_manager.go
	tests/factory/factory_run.go
	tests/kvfeed/kvfeed_run.go