Added psmisc runtime dependency

Added psmisc runtime dependency

Mic users fuser utility from psmisc package, but doesn't depend on
psmic. This causes crash on the system without psmisc installed:

Error <creator>: Command 'fuser' is not available.
Exception mic.utils.errors.CreatorError: CreatorError() in <bound method
LiveUSBImageCreator.__del__ of <mic.imager.liveusb.LiveUSBImageCreator
object at 0x15a9fd0>> ignored
Warning: Can't cleanup loop device /dev/loop1
Info: mic instance shutdown
Warning: No image and other files in output dir, mic failed?

Change-Id: Id6026d0cc4a805397dc6c206e93f645ff669f7ce
Signed-off-by: Ed Bartosh <eduard.bartosh@intel.com>