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_SNS.cfg b/pcu/PCU_Tests_SNS.cfg
index 1419e1e..0368f36 100644
--- a/pcu/PCU_Tests_SNS.cfg
+++ b/pcu/PCU_Tests_SNS.cfg
@@ -7,7 +7,7 @@
 [LOGGING]
 
 [MODULE_PARAMETERS]
-PCU_Tests.mp_nsconfig := {
+SGSN_Components.mp_nsconfig := {
 	local_ip := "127.0.0.1",
 	local_udp_port := 23000,
 	remote_ip := "127.0.0.1",