Issue #2381277 by dawehner, plach, damiankloip, alexpott, olli, fgm, Wim Leers, Fabianx: Make Views use render caching and remove Views' own "output caching"

Issue #1857256 by dawehner, xjm, tim.plunkett, jibran, ParisLiakos, hussainweb, pcambra, ekes, InternetDevels, rhabbachi, rdrh555, tstoeckler, oadaeh, Gábor Hojtsy, vijaycs85: Fixed Convert the taxonomy listing and feed at /taxonomy/term/%term to Views.

Issue #2260121 by sun: PHPUnit Tests namespace of modules is ambiguous with regular runtime namespace (+ Simpletest tests).

Issue #2308821 by tim.plunkett: Replace FormErrorInterface with $form_state->setErrorByName() and $form_state->setError().

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

Issue #2241827 by killua99, dawehner, djevans | Crell: Using a numeric placeholder in paths in Views UI causes fatal error.

Issue #2161727 by jrockowitz, damiankloip, dawehner: Views that use fields with long names (ie 32 characters) will throw a show-stopping error.

Issue #1786490 by Berdir, amateescu, damiankloip, Wim Leers, dawehner: Add caching to the state system.

Revert "Issue #1786490 by Berdir, amateescu, damiankloip, dawehner: Add caching to the state system."

This reverts commit 8ec847cc.