chore: Make Python 3.5 compatible
chore: Make Python 3.5 compatible

Python 3.5 can't do 'await' in a list comprehension, so don't do that.

Signed-off-by: Kai Blin <ad3597797f6179d503c382b2627cc19939309418@biosustain.dtu.dk>

kblin/mockaioredis,kblin/mockaioredis