Medium: Rename hb_report to crmsh_hb_report

To allow any version of cluster-glue and crmsh to install
in parallel, rename the packaged version of hb_report to
crmsh_hb_report.
Low: Remove Conflicts: cluster-glue from .spec file
Medium: Add report level to wrap crmsh_hb_report

Provide a crmsh interface to crmsh_hb_report.

Adds documentation for the cluster and report levels.