test: setup common stability and robustness properties tracking

lib/volume/pvt/Pvt.Quantower.Tests.cs

@@ -225,4 +225,4 @@ public class PvtIndicatorTests
         double firstVal = indicator.LinesSeries[0].GetValue(0);
         Assert.Equal(0, firstVal);
     }
-}
+}

lib/volume/pvt/Pvt.Tests.cs

@@ -458,4 +458,4 @@ public class PvtTests
         pvt.Update(new TBar(time.AddMinutes(3), 105, 108, 102, 105, 20000));
         Assert.Equal(prevPvt, pvt.Last.Value, Tolerance);
     }
-}
+}

lib/volume/pvt/Pvt.Validation.Tests.cs

@@ -112,4 +112,4 @@ public class PvtValidationTests
         double expected3 = expected2 + 2500 * (10.0 / 105.0);  // = 369.9134...
         Assert.Equal(expected3, result3.Value, 1e-10);
     }
-}
+}