fw: use UnitTestTimeFixture in NCC test case

This commit also changes StrategyTester<S>::onAction to use Signal.

refs #2163

Change-Id: Icd30cfa640972c53efdd8c7f7164b7eb9fc34c1e
diff --git a/tests/daemon/fw/strategy-tester.hpp b/tests/daemon/fw/strategy-tester.hpp
index a1b920d..980144d 100644
--- a/tests/daemon/fw/strategy-tester.hpp
+++ b/tests/daemon/fw/strategy-tester.hpp
@@ -48,7 +48,7 @@
   }
 
   /// fires after each Action
-  EventEmitter<> onAction;
+  signal::Signal<StrategyTester<S>> onAction;
 
 protected:
   virtual void