Issue #2459155 by alexpott, pfrenssen, hussainweb, neclimdul: Remove REQUEST_TIME from bootstrap.php

Issue #1897058 by disasm, rteijeiro: Replace "boolean" with "bool" when used as param/return/var type

Issue #2457887 by prateekMehta, stefan.r, rpayanm, alexpott: Use Utility\SafeMarkup class instead of Utility\String for placeholder(), checkPlain(),format() functions

Issue #2388067 by david_garcia: getQualifiedMapTableName is database specific logic out of the database driver

Issue #2405337 by benjy: EntityFile destination doesn't handle temporary files when the source and destination are the same

Issue #2392319 by alexpott, effulgentsia: Config objects (but not config entities) should by default be immutable

Issue #2328919 by Mile23, YesCT, tim.plunkett: Remove () from a bunch of @covers definitions in PHPUnit

Issue #2321385 by alexpott, bircher, amateescu, swentel, benjy: Fixed Creation of node body field in postSave() incompatible with default config and overrides.

Issue #2312385 by estoyausente, svendecabooter, ultimike, benjy, Rade, andyceo: Fixed Move schemas for migrate_drupal sources to migrate_drupal module.

Issue #2336199 by benjy, tstoeckler, ultimike: Added Allow to specify the database target for a specific migration.

Issue #2313241 by aleksip, benjy: Fixed d6_taxonomy_term migrate fails when the parent term has not been already migrated.