num_logs has different values on different distros

on debian 7 its 4, on everything else its 5

Lets remove this as it looks related only to logrotation

Author: artem-sidorenko

controls/package_spec.rb

@@ -88,7 +88,6 @@
     its('log_file') { should cmp '/var/log/audit/audit.log' }
     its('log_format') { should cmp 'raw' }
     its('flush') { should match(/^INCREMENTAL|INCREMENTAL_ASYNC$/) }
-    its('num_logs') { should cmp 5 }
     its('max_log_file_action') { should cmp 'ROTATE' }
     its('space_left') { should cmp 75 }
     its('action_mail_acct') { should cmp 'root' }