Verify standby/active cache state in OCF entry points

Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>

tests/unit/tests/cleaning/cleaning.c/ocf_cleaner_run_test.c

@@ -91,6 +91,11 @@ void __wrap_ocf_mngt_cache_unlock(env_rwsem *s)
 	function_called();
 }
 
+bool __wrap_ocf_cache_is_standby(ocf_cache_t cache)
+{
+        return false;
+}
+
 static void cleaner_complete(ocf_cleaner_t cleaner, uint32_t interval)
 {
 	function_called();