Make managix scripts properly executable

Most of the scripts managix was using were missing the shebang at the beginning of the script.
This can be problematic if one uses a shell besides bash. This patch fixes that.

Change-Id: Ie7722f832d0d25bec049e123a0ed1570d0aeb650
Reviewed-on: https://asterix-gerrit.ics.uci.edu/286
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Raman Grover <ramangrover29@gmail.com>
diff --git a/asterix-events/src/main/resources/scripts/prepare.sh b/asterix-events/src/main/resources/scripts/prepare.sh
index 9af8792..cde3f59 100644
--- a/asterix-events/src/main/resources/scripts/prepare.sh
+++ b/asterix-events/src/main/resources/scripts/prepare.sh
@@ -1,3 +1,4 @@
+#!/usr/bin/env bash
 #/*
 # Copyright 2009-2013 by The Regents of the University of California
 # Licensed under the Apache License, Version 2.0 (the "License");