stage0: don't copy image annotations to pod manifest RuntimeApp annotations.
stage0: don't copy image annotations to pod manifest RuntimeApp annotations.

When generating the pod manifest, RuntimeApp annotations shouldn't be copied
from the image annotations but, as explained in the appc spec, they should be
merged only when required by the metadata service.

cab105/rkt,cab105/rkt,nhlfr/rkt,jonboulle/rkt,joshix/rkt,shobhit85/rkt,rkt/rkt,jakon89/rkt,alban/rkt,sstabellini/rkt,sstabellini/rkt,ybubnov/rkt,s-urbaniak/rkt,jonboulle/rkt,Shashwatsh/rkt,kinvolk/rkt,joshix/rkt,yifan-gu/rkt,coreos/rkt,Shashwatsh/rkt,sstabellini/rkt,dgonyeo/rkt,Shashwatsh/rkt,kinvolk/rkt,rkt/rkt,s-urbaniak/rkt,achanda/rkt,kinvolk/rkt,euank/rkt,dgonyeo/rkt,squeed/rkt,achanda/rkt,shobhit85/rkt,yifan-gu/rocket,jakon89/rkt,lucasallan/rkt,ybubnov/rkt,euank/rkt,jonboulle/rkt,yifan-gu/rocket,coreos/rkt,lucasallan/rkt,kinvolk/rkt,nhlfr/rkt,squeed/rkt,nhlfr/rkt,achanda/rkt,s-urbaniak/rkt,yifan-gu/rkt,intelsdi-x/rkt,lucasallan/rkt,squeed/rkt,dgonyeo/rkt,ybubnov/rkt,cab105/rkt,jakon89/rkt,shobhit85/rkt,joshix/rkt,joshix/rkt,yifan-gu/rocket,lucasallan/rkt,alban/rkt,euank/rkt,alban/rkt,intelsdi-x/rkt,yifan-gu/rkt,rkt/rkt,rkt/rkt,intelsdi-x/rkt,coreos/rkt