Created config guide for SDC sample app

Created config guide for SDC sample app

- Overview with micro-service diagram
- Source diagram file in GIMP with layers for editing by
others
- Deploying the sample
- Using the sample
- Exposing Jaeger Tracing and Prometheus monitoring browser
interfaces
- Modifying run-time micro-service configuration including
modifying load balancer server list and adding a custom snort rule
- Uninstalling the sample

- Updated overview with service description, table and traffic
flow description, general edits
- Link to A/B configuration guide and doc index file
- Additional edits
- Diagram for Jaeger UI with SDC

Change-Id: I5d851316c05a9e1bd48c8aab5511a98116e6893d
Signed-off-by: Eddie Arrage <eddie.arrage@huawei.com>