docs(ssl_endpoints): open port 443 in ec2 secgroup
feat(tests): add CI node setup script

Adds a new shell script with the incantations needed to get an
Ubuntu 14.04 worker node connected to our Jenkins CI server.
fix(tests): call other tests scripts in local dir by explicit path
Merge pull request #1704 from mboersma/test-scripts-node-setup

feat(tests): add CI node setup script
Merge pull request #1713 from bacongobbler/ssl-ec2-secgroup

docs(ssl_endpoints): open port 443 in ec2 secgroup