Mark compatible with katello/certs 17.x

Author: ekohl

metadata.json

@@ -34,7 +34,7 @@
     },
     {
       "name": "katello/certs",
-      "version_requirement": ">= 15.0.0 < 17.0.0"
+      "version_requirement": ">= 15.0.0 < 18.0.0"
     },
     {
       "name": "theforeman/pulpcore",