Set default InitConstMask treshold to zero (#5515)

inference-engine/src/offline_transformations/include/pruning.hpp

@@ -32,7 +32,7 @@ class ngraph::pass::InitConstMask : public ngraph::pass::MatcherPass {
 public:
     NGRAPH_RTTI_DECLARATION;
     explicit InitConstMask(const ngraph::AxisSet & dims,
-                           const std::function<bool(const double & value)> & condition = [](const double & value) { return value < 1e-5; });
+                           const std::function<bool(const double & value)> & condition = [](const double & value) { return value == 0; });
 };
 
 /**