test(pageObjects): Added rxEnvironment Page Object

Added a page object for rxEnvironment. getEnv returns the current environment.
Actually, we can't do this. We concatenate all components into one `index.js` file, and so to use this everywhere we'd have to come up with a unique name for each replaced `this` reference, since `component` is already defined here once. We could constantly re-assign the `var component = ` variable in every component's exports, but that's a definite code smell.

Why not leave it up to the individual component functions to define their own copy of a `this` reference to pass into child closures?