Fix engine processor test (#3435)
Fix engine processor test (#3435)

- Test fails when within two weeks of a daylight savings change.
- Note to self: don't use math expressions with time.
quantumlib/Cirq,quantumlib/Cirq,quantumlib/Cirq,balopat/Cirq,balopat/Cirq,balopat/Cirq,quantumlib/Cirq,quantumlib/Cirq