iotlab driver: Removed the 4 minutes, which were added by default to the leases in order to have aligned timeslots in MySlice
iotlab driver: Removed the 4 minutes, which were added by default to the leases in order to have aligned timeslots in MySlice

yippeecw/sfa,onelab-eu/sfa,onelab-eu/sfa,yippeecw/sfa,yippeecw/sfa,onelab-eu/sfa