test(pageObjects): Added rxEnvironment Page Object

Added a page object for rxEnvironment. getEnv returns the current environment.
A named parameter is a big improvement, but boolean arguments by their nature result in needless conditional statements in the callee. By putting boolean-only conditionals into callee functions, you increase the number of things that a callee function needs to "know how to do". When you're using a boolean, the caller already knows what it needs, ideally there will be two different functions for accomplishing those needs. 

In short, take care of business as soon as you know what you need. The further you put off making a decision (i.e. taking a conditional branch) the better the chance that something will get messed up along the way.

For this, it's probably not worth changing it. I just thought I'd throw the thought out there to get it into peoples' heads for the future.