Move create/destroy db scripts to bash

There was a "[[: not found" error with sh

test/create_test_db

@@ -1,4 +1,4 @@
-#! /bin/sh
+#! /usr/bin/env bash
 if [ -z "$1" ]
   then
     echo "Please supply the connection uri for the user with create database privileges"

test/destroy_test_db

@@ -1,4 +1,4 @@
-#! /bin/sh
+#! /usr/bin/env bash
 if [ -z "$1" ]
   then
     echo "Please supply the connection uri for the user with create database privileges"