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

(cherry picked from commit 69501f30)

Issue #2969902 by mihai11, Jo Fitzgerald, amateescu, alexpott: Fix "MigrateCckFieldInterface is deprecated in Drupal 8.3.x and will be removed before Drupal 9.0.x. Use \Drupal\migrate_drupal\Annotation\MigrateField instead." deprecation message

Issue #2833206 by quietone, heddn, maxocub, Jo Fitzgerald, joelpittet, phenaproxima, jibran: Convert Migrate's cckfield plugins to use the new field plugins

Issue #2683435 by quietone, Jo Fitzgerald, hussainweb, mikeryan, Steven Jones, alexpott, phenaproxima, Sam152, Pavan B S, michael_wojcik, Prashant.c, heddn, benjy: CCK does not exist in Drupal 7, rename Migrate's cckfield plugins to field plugins