Please open a new topic when you hit an issue similar to one that was resolved so we can reduce the confusion in our community posts.
To your issue:
How are you trying to install?
http://archive.cloudera.com/cm5/redhat/7/x86_64/cm/5/RPMS/x86_64/ resolves to the latest release. If you want 5.15.0, please use:
If you can clarify more about what you are trying to do we will be able to assist.