tests/docker: add NOUSER for alpine image

The alpine image doesn't have a standard useradd binary so disable
this convenience feature for it.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220225172021.3493923-3-alex.bennee@linaro.org>
1 file changed