SWPROT-8953: build: Limit tests to zpc since UnifySDK-1.7 dep

As reported in earlier commit, using UnifySDK-1.7 has an impact on tests:

The following tests did not run:
        188 - zwave_smartstart_management_test (Disabled)

The following tests FAILED:
          1 - unify_build (Failed)
        160 - zwave_command_class_switch_multilevel_test (Failed)
        201 - binding_cluster_mapper_test (Failed)

When rescoping to just test zpc, it is still failling:

1The following tests did not run:
        131 - zwave_smartstart_management_test (Disabled)

The following tests FAILED:
        103 - zwave_command_class_switch_multilevel_test (Failed)
        144 - binding_cluster_mapper_test (Failed)

        Start  10: zpc_stdin_test
        (...)
        Invalid number of arguments: Payload needs to be specified.
        Example: zwave_command_handler_dispatch 87010003500308500403500506
        zwave_command_handler_dispatch: Invalid argument: stoi

Let's bypass revert some changes, until they pass again.

Origin: #13
Signed-off-by: Philippe Coval <[email protected]>

Author: rzr

helper.mk

@@ -163,9 +163,15 @@ build: ${build_dir}/CMakeCache.txt
 ${build_dir}/%: build
 	file -E "$@"
 
-test: ${build_dir}
+default/test: ${build_dir}
 	ctest --test-dir ${<}
 
+zpc/test: ${build_dir}/applications/zpc
+	ctest --test-dir ${<}
+
+test: zpc/test
+	@echo "TODO: enable more test"
+
 check: test
 
 dist: ${build_dir}