Merge pull request #15078 from nbudin/fix_merger_filter_binds_comparison_master

Make filter_binds filter out symbols that are equal to strings

Conflicts:
	activerecord/CHANGELOG.md
Merge pull request #14871 from kassio/kb-fixes-namespaced-habtm

Fix how to compute class name on habtm namespaced.

Conflicts:
	activerecord/CHANGELOG.md
Don't use Active Support where it is not needed.

parent_name is a string of nil, never a blank string so we don't need to
use presence.
Merge pull request #15088 from kares/shareable-modules

[postgres] remove (outer) sub-class declarations with nested modules/classes
Methods of these modules are internal

They should not be used on people application so they should not be
present on the API documentation.
:scissors:
Add missing requires for require 'action_dispatch/routing'
Only path requirements are relevant to optimized urls

The bit of URL generation that is optimized is the generation of
the path so things like :host, :port, etc. are irrelevant.
Remove unused method in RouteSet test.
update ruby-oci8 version specification. Closes #15109. [ci skip]

/cc @yahonda
flexible ruby-oci8 version specification. [Gaurav Sharma]

Follow up to #15109.

/cc @Gaurav2728
Merge pull request #15116 from tgxworld/remove_unused_method_in_test

Remove unused method in RouteSet test.
Remove ruby-head from allow_failures matrix
Revert "Remove ruby-head from allow_failures matrix"

This reverts commit 5d2d301024cc0b17f26f6b454ac22a72f1db8a23.
Add RFC4791 MKCALENDAR method
Changed extract_limit in class Column to return correct mysql float and double limits
Merge pull request #14791 from asn62/mysql_double_bug

Changed extract_limit in class Column to return correct mysql float and
double limits
Merge pull request #15121 from skarpesh/rfc4791-methods

Add RFC 4791 MKCALENDAR method
fixes stack level too deep exception on action named 'status' returning 'head :ok'
Merge pull request #15118 from khelben/head_with_status_action_stack_level_too_deep

fixes stack level too deep exception on action named 'status' rendering 'head :ok'