[Docs] Added sample pillars to readme.
[Docs] Added sample pillars to readme.

Change-Id: I5078bbf988a6638bd16bb9728ed9d349c8802daa

pupapaik/salt-formula-opencontrail,Martin819/salt-formula-opencontrail,Martin819/salt-formula-opencontrail,pupapaik/salt-formula-opencontrail,Martin819/salt-formula-opencontrail,pupapaik/salt-formula-opencontrail,Martin819/salt-formula-opencontrail,pupapaik/salt-formula-opencontrail