[cloud] fix connection_draining idempotency in ec2_elb_lb (#21323)
[cloud] fix connection_draining idempotency in ec2_elb_lb (#21323)

* Fix connection_draining idempotency in ec2_elb_lb

Ensure connection_draining types are equivalent when comparing
whether or not connection_draining is being changed.

This means that running `ec2_elb_lb` with connection_draining
set a second time will now report `changed=False`

* ec2_elb_lb: fixed latest Ansible standards compliance

Update to current pep8 standards, fix module imports
and remove module from exclusion file

thaim/ansible,thaim/ansible