Screwdriver in a Box enhancements

[vnugopal]

What happened:

What you expected to happen: As a CICD user I should be able to

• Use a simple command to launch Screwdriver in my development environment using the same screwdriver.yaml that is used to launch the builds in the screwdriver build clusters
• Jobs defined in the pr /pullrequest should be kicked off in containers on the development box
• Requirements for the development box should be defined
• Have an ability to to talk to screwdriver api and use the same templates in local development as well
• Mechanism for SSH-CA and Athens protections should be enhanced for local development as well

How to reproduce it:

[vnugopal]

cc @jithin1987 will add more as I get time.