Issue #2821499 by jungle, Andy_D, nikitagupta, lomasr, bbombachini, alexpott, andypost, Mile23, quietone, Sophie.SK, mtodor, barone, kuldeep_mehra27, vsujeetkumar, swatichouhan012, jhodgdon: Enable phpcs rule DrupalPractice.InfoFiles.NamespacedDependency

Issue #2578485 by Mile23, mayeco, TamCalderwood, alduya, Gravypower, Andy_D, alexpott, slde_rorschach: Composer::preAutoloadDump fails with no specified classmap