Rename fail_immediately variable to fail-immediately

Or rename `fail-immediately` to `fail_immediately`. But this way also needs to modify the `readme`

Author: wuctlby

test/run_generator_tests.sh

@@ -386,13 +386,13 @@ print_usage()
 ####################
 
 # whether or not to exit after first test has failed
-fail_immediately=
-[[ "${1}" == "--fail_immediately" ]] && fail_immediately=1
+fail-immediately=
+[[ "${1}" == "--fail-immediately" ]] && fail-immediately=1
 
 while [ "$1" != "" ] ; do
     case $1 in
-        --fail_immediately ) shift
-                             fail_immediately=1
+        --fail-immediately ) shift
+                             fail-immediately=1
                              ;;
         --keep-artifacts )   shift
                              KEEP_ONLY_LOGS=0
@@ -504,7 +504,7 @@ for ini in ${ini_files_full_paths} ; do
     RET=${?}
     if [[ "${RET}" != "0" ]] ; then
         ret_global=${RET}
-        [[ "${fail_immediately}" == "1" ]] && break
+        [[ "${fail-immediately}" == "1" ]] && break
     fi
 done
 
@@ -531,7 +531,7 @@ while (( completed < total_tests )) ; do
             if [[ "${RET}" != "0" ]] ; then
                 echo_red "Test ${test_num}: ${ini_path} with generator ${generator} -> FAILED"
                 ret_global=${RET}
-                if [[ "${fail_immediately}" == "1" ]] ; then
+                if [[ "${fail-immediately}" == "1" ]] ; then
                     # Kill remaining background jobs
                     for remaining_pid in "${test_pids[@]}" ; do
                         kill ${remaining_pid} 2>/dev/null