default reason for stub_supports
default reason for stub_supports

stub supports was returning nil for the reason of not supporting a feature
This resulted in api tests that were expecting an "unsupported" in the reason but was just nil

jrafanie/manageiq,kbrock/manageiq,mzazrivec/manageiq,mzazrivec/manageiq,ManageIQ/manageiq,mzazrivec/manageiq,kbrock/manageiq,jrafanie/manageiq,jrafanie/manageiq,ManageIQ/manageiq,kbrock/manageiq,ManageIQ/manageiq,ManageIQ/manageiq,kbrock/manageiq,mzazrivec/manageiq,jrafanie/manageiq