Merge pull request voxpupuli#665 from voxpupuli/maint/systemd-4.0.0

bump puppet/systemd to < 5.0.0

Author: bastelfreak

metadata.json

@@ -59,7 +59,7 @@
     },
     {
       "name": "puppet/systemd",
-      "version_requirement": ">= 2.5.1 < 4.0.0"
+      "version_requirement": ">= 2.5.1 < 5.0.0"
     },
     {
       "name": "puppet/zypprepo",