Summary: Restructure the current logic used for loading the config data into a ClientConfig object. Rather than having loadFromClientDirectory iterate through all the config files and parse them to find the necessary information, abstract that logic out into a new method that compiles all of the relevant data so that all loadFromClientDirectory has to do is pull out the needed information. Since this change separates the two steps, this will make it easier to move the first step of compiling config information outside of ClientConfig - the goal here is to have the eden server load all of the config data at start up and cache it in memory so that it doesn't need to be done every time a ClientConfig object is created, and this change is an intermediate step.
Reviewed By: simpkins
Differential Revision: D3580757
fbshipit-source-id: c340a0fe715856066a554238249574f8177bc4d7
