[OOM] use ramdisk to store chartmuseum packages

it seems that chartmuseum may block if place where it stores the results
is not fast enough.
We then create a small ramdisk in order to store these.

Issue-ID: OOM-1
Signed-off-by: Sylvain Desbureaux <sylvain.desbureaux@orange.com>
Change-Id: I36cad6e56f9390bb058beea08df0bf51eda97a09
1 file changed