Revert "vagrant: Drop docker caching mechanism"
Revert "vagrant: Drop docker caching mechanism"

This reverts commit ecc6cf18e3b054bcd990983ba1b3354c08144632.

Change-Id: I118af4fe94a730c031da6638cc74c86f9462b2b0
Signed-off-by: Roman Mohr <6da0130c5aeef94e5bbaabadbf8017270be25c64@redhat.com>

stu-gott/kubevirt,mpolednik/kubevirt,admiyo/kubevirt,fabiand/kubevirt,admiyo/kubevirt,kubevirt/kubevirt,davidvossel/kubevirt,rmohr/kubevirt,sungwonh/kubevirt,fabiand/kubevirt,kubevirt/kubevirt,davidvossel/kubevirt,sungwonh/kubevirt,davidvossel/kubevirt,stu-gott/kubevirt,davidvossel/kubevirt,kubevirt/kubevirt,stu-gott/kubevirt,mpolednik/kubevirt,kubevirt/kubevirt,stu-gott/kubevirt,rmohr/kubevirt