Add shebang for postgres scripts

data/storage/postgres/create_db_with_users.sh

@@ -1,3 +1,4 @@
+#!/bin/bash
 
 #
 # Sample db and users creation. Replace here with your own details

data/storage/postgres/create_ers_db.sh

@@ -1,4 +1,5 @@
+#!/bin/bash
 
-# extra DB for ees and ers
+# extra DB for ers
 sudo -u postgres dropdb -e cgrates2
 sudo -u postgres createdb -e -O cgrates cgrates2