Issue #1927648 by damiankloip, Wim Leers, marthinal, tedbow, alexpott, Arla, juampynr, garphy, bc, ibustos, eiriksm, larowlan, dawehner, gcardinal, kylebrowning, vivekvpandya, Sam152, neclimdul, pnagornyak, drnikki, queenvictoria, gaurav.goyal, kim.pepper, Berdir, clemens.tolboom, blainelang, moshe weitzman, webchick, linclark, dabito, skyredwang, Dave Reid, gabesullice, dagmar, klausi, andypost, aheimlich, slashrsm, pwolanin, xjm, catch, amateescu: Allow creation of file entities from binary data via REST requests

Issue #2843139 by vaplas, Wim Leers, harings_rob, catch, Berdir, alexpott: EntityResource: Provide comprehensive test coverage for File entity, and tighten access control handler

Issue #2739617 by dawehner, Wim Leers, neclimdul, chx: Make it easier to write on4xx() exception subscribers

Issue #2737719 by Wim Leers, dawehner: EntityResource: Provide comprehensive test coverage: for every entity type, every format, every method

Revert "Issue #2737719 by Wim Leers, dawehner: EntityResource: Provide comprehensive test coverage: for every entity type, every format, every method"

This reverts commit 59781ffc.

Issue #2737719 by Wim Leers, dawehner: EntityResource: Provide comprehensive test coverage: for every entity type, every format, every method