Issue #2030655 by justafish, Alumei, daffie, alexpott, wwhurley, jamesquinton, pcambra, InternetDevels, rdatar, james_kerrigan: Expand Role with methods.

Issue #2081153 by YesCT, lauriii, rdatar, miraj9093, Enxebre, smiro, alexpott: Remove unused local variables from core/tests.