[CDH4] Bump version to 1.5.0-cdh4

Change-Id: I2342a7de4a9dc6642d26983dbded181ee8edf9e7
Reviewed-on: http://gerrit.ent.cloudera.com:8080/2982
Reviewed-by: Alex Behm <alex.behm@cloudera.com>
Reviewed-by: Lenni Kuff <lskuff@cloudera.com>
Tested-by: Lenni Kuff <lskuff@cloudera.com>