Move templates from GSUP_Types.ttcn to GSUP_Templates.ttcn

Follow similar structure that we have for other protocols.

Change-Id: I54cc8c99d1e91d57c3d5a92f6529ef2055e9d4ed
diff --git a/msc/BSC_ConnectionHandler.ttcn b/msc/BSC_ConnectionHandler.ttcn
index e25d496..92ec3b1 100644
--- a/msc/BSC_ConnectionHandler.ttcn
+++ b/msc/BSC_ConnectionHandler.ttcn
@@ -31,6 +31,7 @@
 import from RANAP_Templates all;
 
 import from GSUP_Types all;
+import from GSUP_Templates all;
 import from GSUP_Emulation all;
 
 import from MNCC_Types all;