Update so-rule-update to source so-common

salt/common/tools/sbin/so-rule-update

@@ -1,13 +1,7 @@
 #!/bin/bash
-got_root() {
 
-  # Make sure you are root
-  if [ "$(id -u)" -ne 0 ]; then
-          echo "This script must be run using sudo!"
-          exit 1
-  fi
+. /usr/sbin/so-common
 
-}
 
 got_root
 docker exec so-idstools /bin/bash -c "cd /opt/so/idstools/etc && idstools-rulecat --force $1"