When no repositories are defined in zypper, the return code
of "zypper repos" is 6. Handle that case and don't fail
if zypper_repository has to deal with an empty repo list.
Fixes https://github.com/ansible/ansible-modules-extras/issues/795
In case of release repositories or other special cases you might not
need the autorefreshing of the repos. This patch adds a configure
option instead of hard enabling this.
Signed-off-by: Justin Lecher <jlec@gentoo.org>
