Fix OSBS.get_build_logs() (#65).
Fix OSBS.get_build_logs() (#65).

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