Put media links to /var/run/db8/mountpoints

:Release Notes:
Replace /media/mountpoints with /var/run/db8/mountpoints
Add to configuratoin file "mediaMountpointDirectory" section

:Detailed Notes:
Set default media link dir to /var/run/db8/mountpoints
Create /var/run/db8/mountpoints dir if it doesn't exists
Add ability to change output directory in configuration file

:Testing Performed:
Compiled and tested locally

:QA Notes:

:Issues Addressed:
[GF-45408] db8: Replace /media/mountpoints with /var/run/db8/mountpoints

Open-webOS-DCO-1.0-Signed-off-by: Maksym Sditanov <maxim.sditanov@lge.com>

Change-Id: I681d3ec0209a77efe1566fe4dac881fb93271fa2
Reviewed-on: https://g2g.palm.com/3831
Reviewed-by: Build Verification
Tested-by: Maksym Sditanov <maxim.sditanov@lge.com>
Reviewed-by: Igor Kuksyuk <ikuksyuk@luxoft.com>
Reviewed-by: Maksym Sditanov <maxim.sditanov@lge.com>