CTRL_Adapter: Keep server alive after first client disconnects

It can be expected from CTRL clients to connect and disconnect several
times as several commands are sent, so let's by default enable it (only
user of this CTRL servcer in PCU_Tests needs it).

Change-Id: Idddc27671d1b823dfbc62bcf7be673e51b574d63
diff --git a/library/Osmocom_CTRL_Adapter.ttcn b/library/Osmocom_CTRL_Adapter.ttcn
index e1fba1b..adc2887 100644
--- a/library/Osmocom_CTRL_Adapter.ttcn
+++ b/library/Osmocom_CTRL_Adapter.ttcn
@@ -81,7 +81,8 @@
 	map(vc_CTRL_IPA:IPA_PORT, system:IPA_CODEC_PT);
 	connect(vc_CTRL_IPA:IPA_CTRL_PORT, self:IPA_CTRL);
 
-	vc_CTRL_IPA.start(IPA_Emulation.main_server(listen_host, listen_port, false));
+	vc_CTRL_IPA.start(IPA_Emulation.main_server(listen_host, listen_port, false,
+			  server_stop_on_ipa_ev_down := false));
 }
 
 function f_ipa_ctrl_stop() runs on CTRL_Adapter_CT {