CB-5135 Mark scripts as requiring Bash instead of using a random system shell

use /usr/bin/env bash to select bash
standardize on COMMENT for license block

Reviewed by Jeffrey Heifetz <jheifetz@blackberry.com>
Tested by Jenny Gee <jgee@blackberry.com>
CB-4570 Removing unnecessary <content> check for config since index.html is in the default

Reviewed by Bryan Higgins <bhiggins@blackberry.com>
Tested by Tracy Li <tli@blackberry.com>