Reduce and randomise the Elector's retry timer.
Reduce and randomise the Elector's retry timer.

Avoids a long wait if etcd is restarted, for example.

neiljerram/felix,neiljerram/felix,matthewdupre/felix,TrimBiggs/calico,beddari/calico,kasisnu/calico,neiljerram/felix,matthewdupre/felix,alexhersh/calico,Metaswitch/calico,beddari/calico,ocadotechnology/calico,Metaswitch/calico,neiljerram/felix,kasisnu/calico,TrimBiggs/calico,anortef/calico,anortef/calico,ocadotechnology/calico,alexhersh/calico