Gas Optimizations

[code423n4]

See the markdown file with the details of this report here.

[HickupHH3]

First suggestion is pretty substantial in gas savings of about 11.8k

testFailEpochExpired() (gas: 11 (0.000%)) 
testFailEpochNotStarted() (gas: 11 (0.000%)) 
testWithdrawDepeg() (gas: 13 (0.000%)) 
testControllerDepeg() (gas: 13 (0.000%)) 
testTriggerEndEpoch() (gas: -11827 (-0.085%)) 
testSequencerDown() (gas: -11827 (-0.155%)) 
testFailPriceNotAtStrikePrice() (gas: -11902 (-0.202%)) 
testCreateController() (gas: -11827 (-0.754%))
Overall gas change: -47361 (-1.195%)

Second one as well, 2k gas

testAddressFactoryNotInController() (gas: -2209 (-0.052%)) 
testAddressNotAdmin() (gas: -2209 (-0.052%)) 
Overall gas change: -6627 (-0.155%)