* module_utils/ec2: (unit tests) Move unit tests for module_utils/ec2.py into test/units/module_utils
- compare_policies was refactored from s3_bucket
- "ec2_utils" doesn't seem to have ever existed
* module_utils/ec2: (unit tests) Add unit test for comparing quoted and unquoted bools and numbers within policies
As per https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_grammar.html
"Values are enclosed in quotation marks. Quotation marks are optional for numeric
and Boolean values."
* module_utils/ec2: Explicitly convert bools and ints to strings when comparing policies
See also: https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_grammar.html
