Add trailing slash to reprepro-import URL

This was not exposed in testing, as we only a single directory.
Without the trailing slash, we end up downloading all uploaded
packages.

Change-Id: I5442023dfea14b9e70a511222929070086fe7312
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

jenkins/jobs/packaging-mirror.yaml

@@ -21,7 +21,7 @@
               --cut-dirs=4 \
               -R "index.html*" \
               --directory-prefix=$PACKAGE_DIR \
-              $URL
+              $URL/
 
           REPREPRO="k5start -t -f /etc/packaging.keytab \
               service/packaging \