conf: fall back to o_uri when b_o_url not specified
conf: fall back to o_uri when b_o_url not specified

vrutkovs/osbs-client,projectatomic/osbs-client,vrutkovs/osbs-client,DBuildService/osbs-client,jpopelka/osbs-client,DBuildService/osbs-client,jpopelka/osbs-client,bfontecc007/osbs-client,bfontecc007/osbs-client,projectatomic/osbs-client