Merge pull request jruby#8438 from headius/remove_hard_exit

Remove rogue exit(0) that shuts down JVM

Author: headius

core/src/main/java/org/jruby/Main.java

@@ -199,8 +199,6 @@ public static void main(String[] args) {
             if (status.isExit()) {
                 System.exit(status.getStatus());
             }
-
-            System.exit(0);
         }
         catch (RaiseException ex) {
             System.exit( handleRaiseException(ex) );