journald: Raise max files limit

Not strictly necessary yet, but we don't care about a bunch more files
so better safe than without logs.

Signed-off-by: Florian Pritz <bluewind@xinu.at>

roles/common/templates/journald.conf.j2

@@ -22,7 +22,7 @@ RateLimitBurst=100000
 #SystemMaxUse=
 #SystemKeepFree=
 #SystemMaxFileSize=
-SystemMaxFiles=2000
+SystemMaxFiles=10000
 #RuntimeMaxUse=
 #RuntimeKeepFree=
 #RuntimeMaxFileSize=