v21
testsuite: port alias-to-none test to module-playground
testsuite: add test for modprobe -R <builtin-module>
testsuite: port modprobe --force test to module-playground
testsuite: port install-cmd-loop test to module-playground
testsuite: port kcmdline test to module-playground
testsuite: add test for kcmdline params with no value
testsuite: add test to ignore unrelated strings in kcmdline
testsuite: add test for '.' correctly parsed in param's value
testsuite: port tests without finit_module() to module-playground
testsuite: port show-depends tests to module-playground
testsuite: port softdep-loop test to module-playground