Allow suites to dynamically register schemas so tests can receive parameters

Change-Id: Idbe99a35993d193cd97059feb980e61ff14c67ad
diff --git a/selftest/suite_test/test_suite/suite.conf b/selftest/suite_test/test_suite/suite.conf
index 925dedb..4b70be8 100644
--- a/selftest/suite_test/test_suite/suite.conf
+++ b/selftest/suite_test/test_suite/suite.conf
@@ -9,5 +9,11 @@
   modem:
   - times: 2
 
+schema:
+    some_suite_global_param: 'str'
+    test_suite_params:
+      one_bool_parameter: 'bool_str'
+      second_list_parameter: ['uint']
+
 defaults:
   timeout: 60s