Catch GitLab outages in org.cms.WN-basic

In fetch-from-web-GitLab, add `--fail` flag to curl, giving a a non-zero return code for failed downloads.

SiteTests/testjob/tests/fetch-from-web-gitlab

@@ -53,7 +53,7 @@ if [ $useSquid == 1 ] ; then
 fi
 
 wgetOutput=`mktemp`
-cmd="curl --request GET --header \"PRIVATE-TOKEN: kuD9s3WrDGNXZ8BvxFV2\" $url -o $file"
+cmd="curl --fail --request GET --header \"PRIVATE-TOKEN: kuD9s3WrDGNXZ8BvxFV2\" $url -o $file"
 
 cmdFile=`mktemp`
 echo "$cmd > $wgetOutput 2>&1" > $cmdFile