fixed in spacewalk.github: d3900978889786fef86b4c840394653fb55c33da
This bug only addresses not prompting for, or attempting, monitoring install when satellite version is 5.8. A subsequent fix will also prevent monitoring install when satellite proxy version is 5.8.
I thought that the issue is about situation when satellite has disable monitoring and prompt is not shown during installation. 1) disable monitoring on Satellite 5.6 or 5.7 2) run configure-proxy.sh ... You do not have monitoring installed. Do you want to install monitoring scout? Will run 'yum install spacewalk-proxy-monitoring'. [Y/n]: I suppose that correct behavior is that installation skip question about installation monitoring when the monitoring is not enabled on satellite.
I created new bug for previous issue - bug 1459121.
Verified with spacewalk-proxy-installer-2.5.0-10.el6sat.noarch