context in validation goes through has many relationship
Add test case for autosave HasMany with accepts_nested_attributes.

It should not save the parent record when the nested attributes are
invalid.

Test case to cover #8194.
Merge pull request #13974 from laurocaetano/test_case_for_autosave_with_accepts_nested_attributes

Add test case for autosave association with nested attributes.
Fixed an issue where reloading of removed dependencies would cause an unexpected circular dependency error
Skips tests on Windows that create files with illegal characters
Merge pull request #13977 from Octember/master

Fixed an issue where reloading of removed dependencies would cause an un...
Merge pull request #13979 from mellowi/windows_disallowed_static_files_skipped

Skips tests on Windows that create files with illegal characters
Skips linked folder tests if symlink is invalid
Merge pull request #13980 from mellowi/skipping_linked_folder_tests_if_symlink_is_invalid

Skips linked folder tests if symlink is invalid
Merge pull request #13978 from Fortisque/kevin/validation_context_for_children

context in validation goes through has many relationship
Reaper has access to threadsafe active? call
Merge pull request #13981 from Fortisque/kevin/postgresql_reaper_threadsafe

Reaper has access to threadsafe active? call
use feature detection to decide which implementation to use

Decouple the code from the particular Ruby version.
use File.exist? instead of File.exists?
Merge pull request #13983 from hsbt/remove-warning

use File.exist? instead of File.exists?