Marconi Operations Document

Adding developer/operation documents including:
1. Glossary
2. Install and configure
3. Deploy Marconi in a minimal HA env
4. Access API with Marconi client

Co-Authored-By: Fei Long Wang <flwang@cn.ibm.com>

Implements: blueprint docs

Change-Id: I2549995fb0754c7f3c8ce718639e1299e2805795
Merge "Marconi Operations Document"