MODE-2245: Configuration for basic HTTP authentication

This PR adds web.xml to EAP/WF specific folder where basic HTTP authentication is enabled. Web-explorer itself introduces servlet filter class which catches HTTP authentication process and uses HTTP creds to log in into repository.
Can you add a comment that describes what this is, what the normal app behavior is, how that behavior changes with this constraint, and how to change back to the normal app behavior (I'm assuming simply comment it out)?