Address Valgrind issues in CI

Fixes "uninitialized values" errors reported by Valgrind. Problem
occurred from lack of specializations of googletest's PrintTo functions
for several custom types.

Tested:
On local CI container. After applying this patch issues stopped
appearing.

Change-Id: I98d9fd19724bee15add7b19422a9ddc2e4cbef09
Signed-off-by: Michal Orzel <michalx.orzel@intel.com>
diff --git a/tests/src/helpers.hpp b/tests/src/helpers.hpp
index 1c4905c..67e179d 100644
--- a/tests/src/helpers.hpp
+++ b/tests/src/helpers.hpp
@@ -4,5 +4,8 @@
 #include "helpers/interfaces/sensor_id_helpers.hpp"
 #include "helpers/labeled_tuple_helpers.hpp"
 #include "helpers/metric_value_helpers.hpp"
+#include "helpers/report_params_helpers.hpp"
+#include "helpers/trigger_helpers.hpp"
+#include "helpers/types/container_types_helpers.hpp"
 #include "helpers/types/duration_types_helpers.hpp"
 #include "helpers/types/object_path_helpers.hpp"