This time i have done setup on 8 core srever with ocata version of openstack. I know ocata is not compatible with bosh right now. But I think it should work. Bosh director deployment has been done successfully as shown below message. I am also able to login with vcap user. But still I am not able to get root access.
Started validating Downloading release 'bosh'... Skipped [Found in local cache] (00:00:00) Validating release 'bosh'... Finished (00:00:01) Downloading release 'bosh-openstack-cpi'... Skipped [Found in local cache] (00:00:00) Validating release 'bosh-openstack-cpi'... Finished (00:00:00) Validating cpi release... Finished (00:00:00) Validating deployment manifest... Finished (00:00:00) Downloading stemcell... Skipped [Found in local cache] (00:00:00) Validating stemcell... Finished (00:00:03) Finished validating (00:00:06)