Fix OPENTAR-65: Add information about replication status to box.info.status

This patch also reworks title() to show role@custom_proc_title for all roles
as defined in the documentation.
Merge branch 'opentar65-replication-status' into stable
Merge remote-tracking branch 'origin/stable'

Conflicts:
	include/tarantool.h
	src/box/box.cc
	src/replica.cc
	src/replication.cc