cli: use given namespace for --from-docker-build
cli: use given namespace for --from-docker-build

bfontecc007/osbs-client,vrutkovs/osbs-client,twaugh/osbs-client,twaugh/osbs-client,pbabinca/osbs,projectatomic/osbs-client,jpopelka/osbs-client,projectatomic/osbs-client,bfontecc007/osbs-client,vrutkovs/osbs-client,pbabinca/osbs,DBuildService/osbs-client,pombredanne/osbs-client,DBuildService/osbs-client,pombredanne/osbs-client,jpopelka/osbs-client