README file missing content

[abhiniveshjain]

README file doesn't have following covered-

1. installing git and git clone of repository to start this work.
   yum install git
   git clone https://github.com/redhat-nfvpe/kni-upi-lab.git

2. Update of cluster/ha-lab-ipmi-creds and giving username password in base64 format

3. Details on OS requirement of installer node. like what all OS and versions are supported?

4. if BM and Prov CIDR is not same as used in AF then where and how to change it?

5. Instruction on whether or not, Provisioning and baremetal network interfaces should be set prior to running this automation or just the management IP is enough?

6. Add this instruction- Run prep_bm_host.sh while connected thru management IP. No SSH from BM or PROV IP to management IP will work since it will disconnect the session during bridge creation.