[docbug] Installation instructions specify a script that doesn't exist in the repo

[Eliad Cohen]

https://github.com/cloud-bulldozer/browbeat/blob/master/doc/source/installation.rst

When installing on the undercloud, instructions include:
[root@undercloud ~]# su - stack
[stack@undercloud ~]$ git clone https://github.com/openstack/browbeat.git
[stack@undercloud ~]$ source stackrc
[stack@undercloud ~]$ cd browbeat/ansible
[stack@undercloud ansible]$ ./bootstrap.py tripleo

The ansible folder or the repo for that matter do not include this bootstrap.py