[cloud][contrib] Set missing default values for EC2 inventory (#28375)
[cloud][contrib] Set missing default values for EC2 inventory (#28375)

* Set missing default values for EC2 inventory

* Make it run even with no ec2.ini file

* Fixing INI file reading

* Refactor how defaults are handeled

Define defaults in a dictionary and use .get rather than if statements with has_option

* Removing double keys and fixing logic for instance_filter

* Removing one more doubled key

thaim/ansible,thaim/ansible