Issue #2866513 by michielnugter, jonathan1055, mpdonadio, Jo Fitzgerald, Lendude, dawehner, Wim Leers: Convert web tests to browser tests for comment module

(cherry picked from commit 73bba855)

Issue #2776975 by joelpittet, dawehner, tim.plunkett, xjm, pfrenssen: March 3, 2017: Convert core to array syntax coding standards for Drupal 8.3.x RC phase

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

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

Issue #2028025 by David Hernández, Berdir, larowlan, ceng, YesCT, a_thakur: Expand CommentInterface to provide methods.

Issue #1778178 by fago, Berdir, effulgentsia, mradcliffe, das-peter: Convert comments to the new Entity Field API.

Issue #1821612 by dawehner, larowlan: Fixed Views comment RSS plugin calls comment_view() with wrong arguments.