angi: re-apply shellcheck compatibility (lost be cross-porting PR144)

ra/saphana-common-lib

@@ -492,9 +492,9 @@ function HANA_CALL() {
                             output=$(timeout --foreground -s 9 "$timeOut" su - "${sid}adm" -c "($pre_script; timeout -s 9 $timeOut $cmd > $cmd_out_log) >& $cmd_err_log" 2>"$su_err_log"); rc="$?"
                             ;;
                   esac
-                  if [[ -f "$cmd_out_log" ]]; then output=$(<$cmd_out_log); rm -f "$cmd_out_log"; fi
-                  if [[ -f "$su_err_log" ]];  then suErr=$(<$su_err_log);   rm -f "$su_err_log";  else suErr='NA'; fi
-                  if [[ -f "$cmd_err_log" ]]; then cmdErr=$(<$cmd_err_log); rm -f "$cmd_err_log"; else cmdErr='NA'; fi
+                  if [[ -f "$cmd_out_log" ]]; then output=$(<"$cmd_out_log"); rm -f "$cmd_out_log"; fi
+                  if [[ -f "$su_err_log" ]];  then suErr=$(<"$su_err_log");   rm -f "$su_err_log";  else suErr='NA'; fi
+                  if [[ -f "$cmd_err_log" ]]; then cmdErr=$(<"$cmd_err_log"); rm -f "$cmd_err_log"; else cmdErr='NA'; fi
                   super_ocf_log debug "DBG: RA ==== action HANA_CALL (cmd is '$cmd', rc is '$rc', stderr from su is '$suErr', stderr from cmd is '$cmdErr') ===="
                   # on rc=1 - retry to improve the behavior in AD environments
                   # fh 20230127 deactivate this part. rc=1 could also be the valid rc of the called command