0024870: Provide OCCT RTTI test cases

Test commands for checking performance and functionality of OCCT handles and RTTI added.
New test case added for that: test perf fclasses handle.

Implementation of opencascade::handle improved to enable compile-time error if two handles of incompatible types are compared.
Comparison of handle to NULL is not possible any more; method IsNull() should be used instead.

Method LDOM_MemManager::Doc() is removed to avoid cyclic dependency of headers; constructor of LDOM_Document(LDOM_MemManager&) is used directly instead.

Inclusion of headers corrected for compilation after previous patch.

src/BRepTools/BRepTools.hxx

@@ -27,6 +27,9 @@
 #include <Standard_OStream.hxx>
 #include <Standard_IStream.hxx>
 #include <Standard_CString.hxx>
+
+#include <Message_ProgressIndicator.hxx>
+
 class TopoDS_Face;
 class TopoDS_Wire;
 class TopoDS_Edge;

src/BRepTools/BRepTools_Modifier.hxx

@@ -24,6 +24,9 @@
 #include <TopTools_DataMapOfShapeShape.hxx>
 #include <TopoDS_Shape.hxx>
 #include <Standard_Boolean.hxx>
+
+#include <Message_ProgressIndicator.hxx>
+
 class Standard_NullObject;
 class Standard_NoSuchObject;
 class TopoDS_Shape;