Bug 1283074 - Make exponent for task retry backoff close to 2 (#1629)
Bug 1283074 - Make exponent for task retry backoff close to 2 (#1629)

This prevents over-long retries or too mcuh variation (the distribution
is centred around 3 hours with thoretical minima and maxima at about 2
and 4 hours). That's not a very long time if we have infra issues, but
is longer than the old one hour limit.
tojonmz/treeherder,glenn124f/treeherder,tojon/treeherder,edmorley/treeherder,glenn124f/treeherder,tojonmz/treeherder,akhileshpillai/treeherder,KWierso/treeherder,glenn124f/treeherder,kapy2010/treeherder,akhileshpillai/treeherder,tojonmz/treeherder,akhileshpillai/treeherder,tojonmz/treeherder,edmorley/treeherder,kapy2010/treeherder,kapy2010/treeherder,edmorley/treeherder,tojon/treeherder,akhileshpillai/treeherder,akhileshpillai/treeherder,akhileshpillai/treeherder,KWierso/treeherder,edmorley/treeherder,tojonmz/treeherder,tojonmz/treeherder,tojon/treeherder,kapy2010/treeherder,kapy2010/treeherder,glenn124f/treeherder,KWierso/treeherder,glenn124f/treeherder,KWierso/treeherder,glenn124f/treeherder,tojon/treeherder