Merge pull request #4522 from scientificlinux/sl7

Update sl container for sl7 to current (build-date=20180702)

library/sl

@@ -8,7 +8,7 @@ Tags: 7, latest
 Architectures: amd64
 GitFetch: refs/heads/7
 Directory: sl7
-GitCommit: bf7fa6a6837b82f8ee1eaa37a5a5520739d8c995
+GitCommit: 3671fb4018f190f7c8c39663d27062345ac6c2f8
 
 # For the SL6 container
 Tags: 6