[HCSD-7409] Makes sure old ASG is scaled down to 0 after being detached

See merge request !22

adding timeout for the healthy vs desired while loop no to wait the gitlab...

See merge request !21

adding timeout for the healthy vs desired while loop no to wait the gitlab job's 1 hour timeout on failure

changing the tag version in setup.py

See merge request !20

Healthy target check

See merge request !19

adding waiter to check the health status of the newly attached instances before detaching the old ones

Update update_asg.py to add a bit more useful logging for scaling up and down

See merge request !17