platform-mc: Added EventManager

Added eventManager to handle sensor event class(00h) which is defined in
table 11 of DSP0248 v1.3.0. In this commit, the eventManager supports to
receive event asynchronously. The commit will also log the Ipmitool SEL
log and Redfish log for PLDM sensor event messages.

Change-Id: I1b337ccae454067841ffbbd8754631216a995542
Signed-off-by: Thu Nguyen <thu@os.amperecomputing.com>
Signed-off-by: Gilbert Chen <gilbertc@nvidia.com>
diff --git a/platform-mc/test/mock_event_manager.hpp b/platform-mc/test/mock_event_manager.hpp
new file mode 100644
index 0000000..116e7f1
--- /dev/null
+++ b/platform-mc/test/mock_event_manager.hpp
@@ -0,0 +1,20 @@
+#pragma once
+
+#include "platform-mc/event_manager.hpp"
+
+#include <gmock/gmock.h>
+
+namespace pldm
+{
+namespace platform_mc
+{
+
+class MockEventManager : public EventManager
+{
+  public:
+    MockEventManager(TerminusManager& terminusManager, TerminiMapper& termini) :
+        EventManager(terminusManager, termini) {};
+};
+
+} // namespace platform_mc
+} // namespace pldm