Clean target repository dir prior to downloading packages

This increases idempotency and allows avoiding side effects
in cases where repo dir already contains images that are not
on the list of required packages.

Change-Id: Ieaa4e407ae7aacdc8d25440d90860cb880df09e2
Issue-ID: OOM-2615
Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>
1 file changed