pcu: Get rid of PCU_Tests.ttcn tests

Delete PCU_Tests.ttcn along with the configs, since they are broken and
we are only adding new tests to PCU_Tests_RAW.ttcn. They are broken
because it's not possible to run multiple tests after another.

Some components which used to be in PCU_Tests.ttcn and which were used
by other PCU_Tests*.ttcn files have been moved to SGSN_Components.ttcn

Selftests have been moved to PCU_selftest.ttcn.

Small placeholder for module PCU_Tests is left in PCU_Tests.ttcn to
still be able to compile the binary as "PCU_Tests" and avoid changing
that part of docker setup. We'll eventually rename RAW tests soon
anyway.

Change-Id: Ie862a1525e9f4f9a3f2427ac3898810e3d044d2f
diff --git a/pcu/PCU_Tests.default b/pcu/PCU_Tests.default
index 537744f..9d9e966 100644
--- a/pcu/PCU_Tests.default
+++ b/pcu/PCU_Tests.default
@@ -7,7 +7,7 @@
 ConsoleMask := ERROR | WARNING | TESTCASE | TIMEROP_START | DEBUG_ENCDEC
 
 [MODULE_PARAMETERS]
-PCU_Tests.mp_gb_cfg := {
+SGSN_Components.mp_gb_cfg := {
 	nsei := 1234,
 	bvci := 1234,
 	cell_id := {