conpaas-director: do not allow to create an app with the same name twice
conpaas-director: do not allow to create an app with the same name twice

ConPaaS-team/conpaas,ConPaaS-team/conpaas,ConPaaS-team/conpaas,ConPaaS-team/conpaas,ConPaaS-team/conpaas,ConPaaS-team/conpaas,ConPaaS-team/conpaas