Freeze columns only once per Result

Conflicts:
	activerecord/lib/active_record/result.rb
remove unused path_without_format variable

Was forgotten in a72dab0.
Fix typo on CHANGELOG.md
Merge pull request #9528 from korny/patch-1

Fix unused variable warning in mapper.rb
Merge pull request #9531 from erik-escobedo/patch-1

Fix typo on ActionPack's ChangeLog
Fix issue #7526. Reload the target if it's stale.

* This has been fixed at master via `365b8b6`, but not at 3-2-stable branch.

* @stale_state should be nil when a model isn't saved. via `0f3901e`.

* set @stale_state to nil when reset the target.
Backport fixes about #7774 to 3-2-stable

Fix ActionDispatch::Request#formats when HTTP_ACCEPT header is an empty
string.
Merge pull request #9543 from maximerety/backport_fix_7774

Backported #7774 to 3-2-stable
Update CHANGELOGs for 3.2.13.rc1
Use shorter prefix and suffix as in Oracle database identifier
cannot be larger than 30 characters
Merge pull request #9594 from yahonda/3-2-stable_prefix_suffix

Use shorter prefix and suffix to support Oracle adapter
Merge pull request #9549 from larrylv/reload-stable-target-before-saving

Fix issue #7526. Reload the association target if it's stale.
@target might be nil when Identity Map is enabled.

* With Identity Map enabled, NameError might be raised and @target is
  nil. So we should always ensure `@target ||= find_target`.

* Only force reload target when it is stale.
Merge pull request #9600 from larrylv/fix-load-target-with-identity-map-on

@target might be nil when Identity Map is enabled.
Using latest AR-JDBC for JRuby

1.2.5 and 1.2.6 are bad ones
Merge pull request #9609 from arunagw/using-latest-arjdbc

Using latest AR-JDBC for JRuby
Removing FIXME

As we did in master.
Merge pull request #9613 from arunagw/remove_fixme

Removing FIXME