Don't install haveged for modular tests (yet)

It's not there, I don't think.

tests/role_deploy_domain_controller.pm

@@ -16,8 +16,10 @@ sub run {
     repo_setup() unless get_var("UPGRADE");
     # we need a lot of entropy for this, and we don't care how good
     # it is, so let's use haveged
+    unless (get_var("MODULAR")) {
         assert_script_run 'dnf -y install haveged', 300;
         assert_script_run 'systemctl start haveged.service';
+    }
     # read DNS server IPs from host's /etc/resolv.conf for passing to
     # rolectl
     my @forwards = get_host_dns();