Issue #2784783 by RytoEX, quietone, jofitz, Charlotte17, Anybody, tomhollevoet, catch, Grevil: Migration of nodes with cck nodereferrer fields fails (SQL error)

Issue #3038234 by Lendude, Gábor Hojtsy, alexpott, xjm, naveenvalecha, zviryatko, Dinesh18, catch, hchonov, cspitzlay, ziomizar, impalash, navneet0693, phenaproxima, snetcher, yogeshmpawar, pasan.gamage, longwave, tstoeckler, Meenakshi.g, Abhijith S, Utkarsh_Mishra, Spokje, shashikant_chauhan, nginex, mglaman, zaporylie, RytoEX, justinlevi, joachim, mondrake, vijaycs85, Mile23, andypost, borisson_, larowlan, GoZ, jofitz, michielnugter, jibran, Wim Leers, ApacheEx, dawehner, martin107, nlisgo, Berdir, Mixologic, Tessa Bakker, boaloysius, scuba_fly, mpdonadio, Manuel Garcia, claudiu.cristea, dagmar, klausi, jonathan1055, anmolgoyal74, jhodgdon, Antonnavi, IRuslan, Mac_Weber, blazey, Ujin, tanmayk, nuez, hswong3i, jmuzz, legovaer, mkalkbrenner, lomasr, marcoscano, maxocub, DuneBL, cilefen, droplet, himanshu-dixit, esoteric1, zahord, wengerk, mohit1604, quietone, sun, tar_inet, tameeshb, gaurav.kapoor, dan2k3k4, Krzysztof Domański, jhedstrom, msankhala, roderik, pritish.kumar, Hardik_Patel_12, sulfikar_s, kostyashupenko, mherchel, nnevill, scott_euser, proeung, saurabh.tripathi.cs, MerryHamster, tim.plunkett, voleger, Pavan B S, brentgees, bircher, markdorison, m1r1k, babruix, NickDickinsonWilde, bapi_22, ceardach, eli-on-drupal, dcam: The PHPUnit Initiative is complete!

Issue #2822382 by voleger, pfrenssen, erozqba, jungle, RytoEX, borisson_, jofitz, shashikant_chauhan, sidharthap, dawehner, xjm, kiamlaluno, catch, daffie, klausi: Make every $modules property protected on classes extending BrowserTestBase and KernelTestBase

Issue #2900291 by martin107, Lendude, RytoEX, vijaycs85, borisson_, jibran, dawehner: Form: Convert system functional tests to phpunit Part 2

Revert "Issue #2822382 by voleger, pfrenssen, erozqba, RytoEX, borisson_, sidharthap, Jo Fitzgerald, shashikant_chauhan: Make every  property protected on classes extending BrowserTestBase and KernelTestBase"

This reverts commit 69501f30.

Issue #2822382 by voleger, pfrenssen, erozqba, RytoEX, borisson_, sidharthap, Jo Fitzgerald, shashikant_chauhan: Make every  property protected on classes extending BrowserTestBase and KernelTestBase

Issue #2225681 by quietone, Jo Fitzgerald, dipakmdhrm, Adita, RytoEX, maxocub, Gábor Hojtsy, phenaproxima, heddn, masipila, iMiksu, ao2, catch, alexpott, xjm: Migrate D6 i18n blocks translated strings

Issue #2500521 by Jo Fitzgerald, RytoEX, quietone, gaurav.kapoor, hussainweb, phenaproxima: Upgrade path for Statistics 7.x and 6.x