445/bower-fix-and-cleanup

[oscgonfer]

This is a PR to test changes on node/bower build process. The issue comes from the fact that bower installs need certs as explained here, but are no longer accepted because of old versions.

This PR changes a few things:

• removes legacy packages (angulartics and google analytics) no longer used
• adds an environment variable to the build process for open-ssl-ca
• fixes the test so that we can test in branches and PRs without deploying to gh pages

This is a preliminary PR to maybe a bigger upgrade of node.js that is discussed in this issue: #445