[svn-r12253] Purpose: Maintenance

Description: Brought VMS changes back. My previous note about
             using std::count; should be in this log.
             C++ on VMS doesn't support "using std::count"

Solution: IFDEF'ed with H5_VMS (until Binh-Minh has a chance to look into it and
          propose a different solution)

Platforms tested: VMS server, heping

Misc. update:

c++/src/H5IdComponent.cpp

@@ -15,11 +15,11 @@
 #include <iostream>
 #endif /*H5_VMS*/
 #include <string>
+#ifndef H5_VMS
 #ifndef H5_NO_NAMESPACE
-#ifdef H5_VMS
     using std::count;
-#endif /*H5_VMS*/
 #endif
+#endif /*H5_VMS*/
 
 #include "H5Include.h"
 #include "H5Exception.h"