Who knows what all this new docker infra is doingm nay be they don't
have the /proc/self/stat or it is not accessible or ... Whatever, just
use RuntimeMXBean, that *seem* to work.

Change-Id: I3ea5ec96163c3ac67f5d5d584a1d90d0d74fed8c
Signed-off-by: Andrey Loskutov <loskutov@gmx.de>