Add L3_Common for shared L3 functions between MSC and SGSN testing

Change-Id: I16e80df610235849180dc946f9457302deafb9d2
diff --git a/msc/MSC_Tests.ttcn b/msc/MSC_Tests.ttcn
index 806ea6d..c46ec80 100644
--- a/msc/MSC_Tests.ttcn
+++ b/msc/MSC_Tests.ttcn
@@ -45,6 +45,7 @@
 import from MobileL3_Types all;
 import from MobileL3_CommonIE_Types all;
 import from L3_Templates all;
+import from L3_Common all;
 
 
 type component MTC_CT extends CTRL_Adapter_CT {