Allow local modification acceptance prompt to be skipped when passing 'skip-prompt' as a parameter value to check_local_mods() function

salt/common/tools/sbin/soup

@@ -227,13 +227,13 @@ check_local_mods() {
     echo ""
     echo "To reference this list later, check $SOUP_LOG".
     echo
-    if [[ -z $UNATTENDED ]]; then
+    if [[ -z $UNATTENDED ]] && ! [[ "${1}" == "skip-prompt" ]]; then
       while true; do
         read -p "Please review the local modifications shown above as they may cause problems during or after the update.
 
 Would you like to proceed with the update anyway?
 
-If so, type 'YES'. Otherwise, type anything else to exit SOUP." yn
+If so, type 'YES'. Otherwise, type anything else to exit SOUP. " yn
 
         case $yn in
           [yY][eE][sS] ) echo "Local modifications accepted.  Continuing..."; break;;
@@ -1405,7 +1405,7 @@ main() {
     fi
 
     echo "Checking for local modifications."
-    check_local_mods
+    check_local_mods skip-prompt
 
     echo "Checking sudoers file."
     check_sudoers