test: setup common stability and robustness properties tracking

lib/volatility/rv/Rv.Quantower.Tests.cs

@@ -342,4 +342,4 @@ public class RvIndicatorTests
         // Different smoothing periods should produce different results
         Assert.NotEqual(val1, val2);
     }
-}
+}

lib/volatility/rv/Rv.Tests.cs

@@ -712,4 +712,4 @@ public class RvTests
     }
 
     #endregion
-}
+}

lib/volatility/rv/Rv.Validation.Tests.cs

@@ -558,4 +558,4 @@ public class RvValidationTests
         double mean = values.Average();
         return values.Average(v => Math.Pow(v - mean, 2));
     }
-}
+}