Added periodic worker stats aggregation to validator node run loop.

Author: mattjhawken

tensorlink/nodes/validator.py

@@ -894,6 +894,7 @@ def run(self):
             if counter % 120 == 0:
                 self.keeper.clean_node()
                 self.clean_port_mappings()
+                self.get_workers()
             if counter % 180 == 0:
                 self.print_status()