Google Code-in

Update readme in https://github.com/openmrs/openmrs-contrib-atlas.

Follow the steps below:

1) Search for 'create environment variables in your bash'

2) Under this change username from 'root' to

3) Under this change password from 'root' to

Submission Steps:

1. git clone https://github.com/openmrs/openmrs-contrib-atlas.
2. update readme
3. create pull request and submit for code review