Update varnish/init.sls

varnish/init.sls

@@ -71,6 +71,7 @@ varnish-modules:
     - force_reset: True
     - refspec_branch: 7.0
     - branch: 7.0
+    - rev: 7.0
   cmd.run:
     - name: ./bootstrap && ./configure && make && make check -j 4 && make install && systemctl restart varnish
     - cwd: /usr/src/varnish-modules