COMPMID-250 make BorderSize explicit and fix float value validation bug

Change-Id: I747fdef3b5ad83a9c00dc42796debe86b6cd972e
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/78686
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
Reviewed-by: Moritz Pflanzer <moritz.pflanzer@arm.com>
diff --git a/tests/validation/Validation.cpp b/tests/validation/Validation.cpp
index 89f91c0..17dc695 100644
--- a/tests/validation/Validation.cpp
+++ b/tests/validation/Validation.cpp
@@ -393,7 +393,7 @@
     }
 }
 
-void validate(float target, float ref, float tolerance_abs_error = std::numeric_limits<float>::epsilon(), float tolerance_relative_error = 0.0001f)
+void validate(float target, float ref, float tolerance_abs_error, float tolerance_relative_error)
 {
     const bool equal = is_equal(target, ref, tolerance_abs_error, tolerance_relative_error);