Issue #2969190 by manish.upadhyay, ranjith_kumar_k_u, Neslee Canil Pinto, mtodor, joachim: Change ModuleInstallerInterface::uninstall() method doc comment that ModuleUninstallValidatorException can be thrown

Issue #2193803 by wturrell, ridhimaabrol24, mglaman, Pavan B S, narendra.rajwar27, abhisekmazumdar, dpi, manish.upadhyay, pankaj.singh, paulocs, Charles Belov, quietone, catch, jim_at_miramontes, dawehner, goodboy: Anonymous users receive access denied when attempting to logout