Requires the libyang 5.x / libnetconf2 4.x / sysrepo 5.x stack the
previous commits introduce, so DEPENDS moves back to +libyang and the
legacy staging prefix override is dropped.
Rewrite the three uci-defaults scripts against 2.8.x: modules now come
from both netopeer2 and libnetconf2, sysrepoctl lost -a, and the
keystore and netconf-server models changed. Add test.sh and a
test-version.sh override for the version-flag-less cli.
Signed-off-by: Alexandru Ardelean <alex@shruggie.ro>
