Python: completely removed old interface elliptics.Session.get_routes and used new elliptics.Session.routes wherever needed.
tools: added '-n/--check_nodes' option to dnet_balancer for printing only nodes spread without route-list.
merge recovery: added user-friendly log when group has only one node with one backend.
monitor: now monitor listen the same net family as the node does.
Pytests: added monitor statistics to log.
Pytest: marked each test case by unique trace_id.
Monitor: moved config of disabled backend to 'backend->config'