ensure a node sleeps a lease period on startup if another node was previously the master
(this backports some changes from the 1.7 branch)
Merge pull request #483 from Incubaid/ARA-64

ensure a node sleeps a lease period on startup if another node was previ...
the start of a masterlease for a node should be as conservative as
possible on the node which the masterset is about
(this fixes yet another multiple masters issue)