Issue #2719695 by alexpott, Mile23: Fix 'Drupal.Classes.ClassDeclaration.CloseBraceAfterBody' coding standard

(cherry picked from commit 133c212e)

Issue #2665992 by alexpott, klausi, heykarthikwithu, xjm, tstoeckler: @file is not required for classes, interfaces and traits

(cherry picked from commit bfde6d34)

Issue #2542748 by plach, effulgentsia, jhedstrom, Gábor Hojtsy, alexpott, mpdonadio, catch, dawehner: Automatic entity updates can fail when there is existing content, leaving the site's schema in an unpredictable state

Issue #2535082 by alexpott, jhedstrom, xjm, plach, Fabianx, effulgentsia, Berdir: Allow hook_update_N() implementations to run before the automated entity updates

Issue #1392754 by tss, justAChris, jhodgdon: Comply with new documentation standards for @file for namespaced class files

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