bts: Disable PCU related tests if PCU socket not configured

With some real HW setups, there's no PCU (osmo-pcu) available locally,
for instance when using a sysmobts, or when using a nanoBTS. There's no
need to waste time and generate extra output by running this tests in
this case.

Furthermore, some tests seem to crash sometimes in that setup, probably
due to using invalid fd (-1):
MTC@801a0da9866a: Setting RSL_SYSTEM_INFO_4 (4): '31061C62F224002A4740E50400'O
 /osmo-ttcn3-hacks/bts/BTS_Tests: Segmentation fault occurred
/usr/lib/titan/libttcn3-parallel-dynamic.so(_Z14signal_handleri+0xa3)[0x7f0c33b48073]
/lib/x86_64-linux-gnu/libc.so.6(+0x33060)[0x7f0c321aa060]
/osmo-ttcn3-hacks/bts/UD_PT.so(_ZN12UD__PortType15UD__PT_PROVIDER13outgoing_sendERKN9UD__Types14UD__send__dataE+0xf0)[0x7f0c349e42f8]
/osmo-ttcn3-hacks/bts/PCUIF_CodecPort.so(_ZN16PCUIF__CodecPort16PCUIF__CODEC__PT4sendERKNS_17PCUIF__send__dataERK9COMPONENT+0x19e)[0x7f0c37e1731a]
/osmo-ttcn3-hacks/bts/PCUIF_CodecPort.so(_ZN16PCUIF__CodecPort16PCUIF__CODEC__PT4sendERKNS_26PCUIF__send__data_templateE+0x5f)[0x7f0c37e174f7]
/osmo-ttcn3-hacks/bts/BTS_Tests.so(_ZN10BTS__Tests20f__TC__pcu__act__reqERK7INTEGERS2_S2_RK7BOOLEAN+0x411)[0x7f0c3eec3210]
/osmo-ttcn3-hacks/bts/BTS_Tests.so(_ZN10BTS__Tests28testcase_TC__pcu__deact__reqEbd+0x15d)[0x7f0c3eec4f27]
/osmo-ttcn3-hacks/bts/BTS_Tests.so(+0xfb65d)[0x7f0c3eeef65d]
/usr/lib/titan/libttcn3-parallel-dynamic.so(_ZN11Module_List15execute_controlEPKc+0x1c)[0x7f0c33af3fbc]

Change-Id: I773c7ec52dd8532bf160e92ffefc8d936ca55de2
diff --git a/bts/BTS_Tests.ttcn b/bts/BTS_Tests.ttcn
index cde9562..753d89b 100644
--- a/bts/BTS_Tests.ttcn
+++ b/bts/BTS_Tests.ttcn
@@ -4186,23 +4186,27 @@
 	execute( TC_ipa_crcx_mdcx_mdcx_dlcx_not_active() );
 	execute( TC_ipa_crcx_sdcch_not_active() );
 
-	execute( TC_pcu_act_req() );
-	execute( TC_pcu_act_req_wrong_ts() );
-	execute( TC_pcu_act_req_wrong_bts() );
-	execute( TC_pcu_act_req_wrong_trx() );
-	execute( TC_pcu_deact_req() );
-	execute( TC_pcu_deact_req_wrong_ts() );
-	execute( TC_pcu_ver_si13() );
-	execute( TC_pcu_data_req_wrong_bts() );
-	execute( TC_pcu_data_req_wrong_trx() );
-	execute( TC_pcu_data_req_wrong_ts() );
-	execute( TC_pcu_data_req_ts_inactive() );
-	execute( TC_pcu_data_req_pdtch() );
-	execute( TC_pcu_data_req_ptcch() );
-	execute( TC_pcu_data_req_agch() );
-	execute( TC_pcu_data_req_imm_ass_pch() );
-	execute( TC_pcu_rach_content() );
-	execute( TC_pcu_paging_from_rsl() );
+	if (mp_pcu_socket != "") {
+		execute( TC_pcu_act_req() );
+		execute( TC_pcu_act_req_wrong_ts() );
+		execute( TC_pcu_act_req_wrong_bts() );
+		execute( TC_pcu_act_req_wrong_trx() );
+		execute( TC_pcu_deact_req() );
+		execute( TC_pcu_deact_req_wrong_ts() );
+		execute( TC_pcu_ver_si13() );
+		execute( TC_pcu_data_req_wrong_bts() );
+		execute( TC_pcu_data_req_wrong_trx() );
+		execute( TC_pcu_data_req_wrong_ts() );
+		execute( TC_pcu_data_req_ts_inactive() );
+		execute( TC_pcu_data_req_pdtch() );
+		execute( TC_pcu_data_req_ptcch() );
+		execute( TC_pcu_data_req_agch() );
+		execute( TC_pcu_data_req_imm_ass_pch() );
+		execute( TC_pcu_rach_content() );
+		execute( TC_pcu_paging_from_rsl() );
+	} else {
+		log("PCU socket path not available, skipping PCU tests");
+	}
 
 	execute( TC_dyn_osmo_pdch_act_deact() );
 	execute( TC_dyn_osmo_pdch_unsol_deact() );