remsim: Add tests using stdin/stdout of osmo-remsim-client-shell

osmo-remsim-client-shell allows to send C-APDU via STDIN of the program
and receive R-APDU via STDOUT.  We can attach to that using the PIPEasp
TTCN3 port, and hence test a [local] osmo-remsim-client-shell
transceiving APDUs from/to a simulated bankd in the test case.

The only sad part about this is that we now will need to have the
implementation under test (osmo-remsim-client-shell binary) in the
same container as the TTCN-3 test, as it will fork/exec it.

This is why we disable it by default and a modulepar must be used to
enable those particular tests.

Change-Id: I3a69c692cf3e6bbe04ce58594050b20da0c37d16
diff --git a/remsim/REMSIM_Tests.cfg b/remsim/REMSIM_Tests.cfg
index 36b0952..e3bb900 100644
--- a/remsim/REMSIM_Tests.cfg
+++ b/remsim/REMSIM_Tests.cfg
@@ -4,6 +4,9 @@
 # testsuite specific configuration, not expected to change
 "./REMSIM_Tests.default"
 
+[MODULE_PARAMETERS]
+RemsimClient_Tests.mp_have_local_client := true
+
 [EXECUTE]
 RemsimServer_Tests.control
 #RemsimBankd_Tests.control