[shared] Clean class names containing storage

apps/shared/function_store.cpp

@@ -0,0 +1,11 @@
+#include "function_store.h"
+#include "cartesian_function.h"
+#include <assert.h>
+
+namespace Shared {
+
+uint32_t FunctionStore::storeChecksum() {
+  return Ion::Storage::sharedStorage()->checksum();
+}
+
+}