Use 'require_ok' so we don't run import()

It causes test failures in environments when the Internet
is not available. Ironic, but highly irritating.  The
goal of this test to basically ensure that it compiles
successfully and doesn't have any silly syntax errors.
v0.02

            Use 'require_ok' instead of 'use_ok' so we
            don't run import() in environments where no
            network is available.                        (RT #96892)