Inrease tick interval

  Increase tick_interval from 0 to 1. This is a workaround for passing
  1) TestTaskManagers.test_deletion_three_offline_nodes_and_one_online
  2) TestTaskManagers.test_delete_offile_nodes_and_recover_them
  Please consider it as a hotfix. Additional investigation is being
  performed.

Change-Id: I5a13941fd4695ab84b342eb4c1587f97081d4803
Partial-Bug: #1384631
Merge "Inrease tick interval"