Document end-to-end solution for API lifecycle with Toolbox

The goal is to document a full e2e supported solution for API lifecycle management using:

• 3scale API Management
• OpenShift (if on-premises)
• Jenkins pipelines
• 3scale toolbox

3scale toolbox should offer all the features needed for automation. Jenkins pipeline templates should be provided (in https://github.com/rh-integration). Documentation should also cover how to run the 3scale toolbox as a container image.

For more details, see the parent epic: THREESCALE-2201

Useful info available here:
Jenkins pipeline that delivers a composite application along with its API:
https://github.com/rh-integration/IntegrationApp-Automation

Code samples on how to use the toolbox from a Jenkins pipeline:
https://github.com/rh-integration/3scale-toolbox-jenkins-samples

Groovy code to ease the use of toolbox from Jenkins pipeline:
https://github.com/rh-integration/3scale-toolbox-jenkins