Revert "(#15797) Change the argument to chkconfig from 'on' to 'reset'"

This reverts commit d2012ae.

The chkconfig line can use `-` to indicate the service should
not be enabled by default.  In this case, `reset` disables all
runlevels, which is the opposite of what `enable=>true` should do.

The original bug referenced in #15797, #528, was also reverted
for (presumably) the same reason:
    41e1285

Author: Eric Sorenson

lib/puppet/provider/service/redhat.rb

@@ -48,7 +48,7 @@ def enabled?
   # Don't support them specifying runlevels; always use the runlevels
   # in the init scripts.
   def enable
-    output = chkconfig(@resource[:name], :reset)
+      output = chkconfig(@resource[:name], :on)
   rescue Puppet::ExecutionFailure => detail
     raise Puppet::Error, "Could not enable #{self.name}: #{detail}"
   end