Add missing av/railtie require
Merge pull request #13457 from strzalek/add-missing-av-railtie

Add missing av/railtie require
added test cases for Resolver#connection_url_to_hash
Merge pull request #13446 from kuldeepaggarwal/resolver-test-cases

Resolver test cases
Add an option `in` for the numeric validation of the model attributes.

Add the ability to provide a Range of Numeric values to define the limits of the interval of values allowed.