`configure_dependency` actually defined callbacks, so rename the method
and move it to the appropriate method.

This reverts commit 1468a4b8.

postgresql test if randomly executed then executes "SHOW max_identifier_length". Hence
the need to ignore certain predefined sqls that deal with system calls.

order on the old ones

The previous behavior added a major backward incompatibility since it
impossible to have a upgrade path without major changes on the
application code.

We are taking the most conservative path to be consistent with the idea
of having a smoother upgrade on Rails 4.

We are reverting the behavior for what was in Rails 3.x and,
if needed, we will implement a new API to prepend the order clauses in
Rails 4.1.

This fix also makes the test order independent.

This method is already present in helper.rb

This adds the ability for rails apps or gems to have granular control
over how a domain object is converted to sql. One simple use case would
be to add support for Regexp. Another simple case would be something
like the following:

    class DateRange < Struct.new(:start, :end)
      def include?(date)
        (start..end).cover?(date)
      end
    end

    class DateRangePredicate
      def call(attribute, range)
        attribute.in(range.start..range.end)
      end
    end

    ActiveRecord::PredicateBuilder.register_handler(DateRange,
      DateRangePredicate.new)

More complex cases might include taking a currency object and converting
it from EUR to USD before performing the query.

By moving the existing handlers to this format, we were also able to
nicely refactor a rather nasty method in PredicateBuilder.

This reverts commit 10259c3e.

reason: this causes rake test_mysql and test_mysql2 fail

Don't think class name is needed as by default belongs_to :select will be linked to Select class.

`NestedThroughAssociationsTest` adds records to `member_details` table.
When test performs `@member_details[0]` then the order of record
is not guaranteed. Hence it is best to start with a clean slate by
deleting unwanted records.

If the order in which tests are executed is changed then test fails.
This commit ensures that all migrations are run before ensuring that
there are no pending migration.

`ReflectionTest` uses column information in tests and those tests break
if tests are run in random order.

As done here d7fc97d3

* Constantize parse token
* Remove extra param passed to `parse_data`