* Fix tags in ec2_instance_facts
The method boto3_tag_list_to_ansible_dict in module_utils/ec2.py changed
and does no longer check whether the returned result of boto3 uses
"key" or "Key" as the tag key identifier.
This fixes ec2_instance_facts to make this check in its own, since boto3
may return "key" instead of "Key"
* Since the indices for the tags are already formatted to lowercase
by the snaking, we can assume, that the index for the tags are already
formatted
Prasad Katti
Wolfgang Felbermeier
Toshio Kuratomi
Rob