Revert "Issue #2510380 by Wim Leers, DuaelFr, mlewand, quicksketch, Reinmar, oleq: Images cannot be linked in CKEditor"

This reverts commit 2d342c0f.

Issue #2510380 by Wim Leers, DuaelFr, mlewand, quicksketch, Reinmar, oleq: Images cannot be linked in CKEditor

Issue #2304461 by dawehner, neclimdul, naveenvalecha, jibran, tim.plunkett, phenaproxima, Xano, hussainweb, sun, hitesh-jain, amateescu, alexpott, daffie, Mile23, Wim Leers, larowlan: KernelTestBaseTNG™

Issue #2232861 by grom358, daffie, alexpott, larowlan, pfrenssen, hussainweb, pcambra, jibran, phenaproxima, moshe weitzman, nick_schuch: Create BrowserTestBase for web-testing on top of Mink

Issue #2406681 by tstoeckler, hussainweb, alexpott, ParisLiakos, almaudoh, tadityar: Add an autoload.php in the repo root to control the autoloader of front controllers

Issue #2315791 by alexpott, cilefen, dawehner: Add functionality to open results in browser window to run-tests.sh

Issue #2421335 by alexpott: Using run-tests.sh with the --list option should not require a db (of any kind)

Issue #2358079 by pwolanin, Berdir: Require a specific placeholder format in db_query() in order to trigger argument expansion, and require explicit 'IN' parameter for conditions

Issue #2376039 by znerol, Wim Leers, alexpott: Undefined property ContainerAwareEventDispatcherTest::results in run-tests.sh

Revert "Issue #2189345 by sanduhrs, jbekker, joshtaylor, benjy, sun: run-tests.sh should exit with a failure code if any tests failed"

This reverts commit 1edfae73.

Revert "Issue #2376039 by znerol, Wim Leers, alexpott: Undefined property ContainerAwareEventDispatcherTest::results in run-tests.sh"

This reverts commit cbc449b8.

Issue #2376039 by znerol, Wim Leers, alexpott: Undefined property ContainerAwareEventDispatcherTest::results in run-tests.sh

Issue #2189345 by sanduhrs, jbekker, joshtaylor, benjy, sun: run-tests.sh should exit with a failure code if any tests failed

Issue #2340667 by YesCT, Pedro Lozano, alexpott, martin107: Protect Drupal\Core\Language\Language::id, and use getId().

Issue #2347493 by Sutharsan | bzrudi71: Fixed Writing test results leads to FATAL because of memory_limit.

Issue #2343389 by ricardoamaro, Sutharsan: Fixed Drupal core testing fails to write results because of SQLITE limitation .

Issue #2310415 by cilefen, ednawig, TravisCarden: Fixed run-tests.sh does not handle the error when invalid test groups/classes are specified.

Issue #2149197 by penyaskito, mikey_p, vijaycs85, herom: Replace format_interval with \Drupal::service('date')->formatInterval().

Issue #697760 by sun: Replace getInfo() in tests with native phpDoc + annotations (following PHPUnit).

Issue #2016629 by larowlan, neclimdul, sun, alexpott, jibran, ParisLiakos, donquixote, effulgentsia, msonnabaum: Refactor bootstrap to better utilize the kernel.

Revert "Issue #2016629 by larowlan, neclimdul, sun, alexpott, jibran, ParisLiakos, donquixote, effulgentsia, msonnabaum: Refactor bootstrap to better utilize the kernel."

This reverts commit cda051c4.

Issue #2016629 by larowlan, neclimdul, sun, alexpott, jibran, ParisLiakos, donquixote, effulgentsia, msonnabaum: Refactor bootstrap to better utilize the kernel.

Issue #2257427 by sun: Run-tests.sh builds + rebuilds two kernels from scratch for every PHP process.