mech_calico: Send heartbeats every 30 seconds, not every 10
mech_calico: Send heartbeats every 30 seconds, not every 10

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