Hugo Lefeuvre authored Jun 15, 2018 and Adrien Béraud committed Jun 20, 2018

Recorded conversations should be stored at a location specified by
the client.

Currently the MediaRecorder generates a filename using timestamps,
and the directory is either specified by the user in the config.yml
or defaulted to the user's /home. This is not a wanted behavior.

This commit introduces the necessary logic to set recording file path
using setPath and deprecates the old way of specifying filename and
dir.

The changes are backward compatible for transition purposes.

In addition to this refactoring, this commit renames the getFilename()
method to getPath(). In fact this method returns "full paths" and not
filenames, so it doesn't make much sense to call it getFilename().

Change-Id: I8eb9756dd1bf2a18fb0c97eec8b9bb72c259a7e5