PYTHON-2266 Test MONGODB-AWS and OCSP with 4.4
PYTHON-2266 Test MONGODB-AWS and OCSP with 4.4

Remove debian71 and ubuntu-12.04 which no longer exist in Evergreen

ShaneHarvey/mongo-python-driver,ShaneHarvey/mongo-python-driver,mongodb/mongo-python-driver,ShaneHarvey/mongo-python-driver,mongodb/mongo-python-driver,mongodb/mongo-python-driver