CommPolicy uses value_type as default IndexedType as this is lets us

communicate from STL containers without effort.
Changed test accordingly.

[[Imported from SVN: r220]]

istl/test/indicestest.cc

@@ -20,7 +20,7 @@ class Array
 {
   friend std::ostream& operator<<(std::ostream& os, const Array& a);
 public:
-  typedef double IndexedType;
+  typedef double value_type;
   Array() : size_(-1)
   {}