Merge pull request #687 from sandwitch/bump_systemd

bump systemd: < 7.0.0

Author: zilchms

metadata.json

@@ -58,7 +58,7 @@
     },
     {
       "name": "puppet/systemd",
-      "version_requirement": ">= 2.5.1 < 5.0.0"
+      "version_requirement": ">= 2.5.1 < 7.0.0"
     },
     {
       "name": "puppet/zypprepo",