Sprockets compressors refactor

remove unused require for string encoding 

Fix usage of psql in db:test:prepare

Fix associations with per-class/multiple database connections

Alias reconnect! to reset! for Mysql2 adapter since they have same behavior.

Adding documentation to clarify usage of attributes hash.

Fix ActiveModel serializable hash to return string keys with :methods

Add HTML5 input[type="date"] helper

Removing old Controller test

The impact of this change has been measured pluralizing
the entire /usr/share/dict/words, showing a 6x speedup

Serialization uses only the attributes hash's keys and calls
methods that are of the same name as the keys on the serialized
object.

TO make build green Revert PR#5001 "removed unuseful require for reply as we are not using require model"

This reverts commit 7381596e.

fix build #5001, model reply is required in cases/primary_keys_test too! for isolated test

fix build #5001, reply model required in relations_test

behavior.

Cleaning Route generation tests

handle id attribute in PrimaryKey module

Fix warning: The method name is a duplicate and wrong.

removed unuseful require for reply as we are not using require model