[svn-r9829] Purpose: Clean up tests

Description:
    + replaced "goto error" with throw exceptions
    + properly cleanup dynamically allocated memory in failure cases,
        for in some cases, the execution continues on after the failures
        were reported.
    + added test utility class InvalidActionException for when an action
        should cause an exception but doesn't.

Platforms tested:
    SunOS 5.7 (arabica)
    Linux 2.4 (eirene)

    Note that there was an error due to the missing symbol H5E_LEN.  To
    be able to test my changes, I temporarily replaced H5E_LEN in c++/src
    with a constant as in the C tests, before the problem can be fixed.
    This value doesn't effect the C++ tests at all, at this time.

c++/test/h5cpputil.cpp

@@ -27,12 +27,22 @@
 #endif
 #include <string>
 
+#include "h5test.h"
+#include "H5Exception.h"
+#include "h5cpputil.h"
+
+#ifndef H5_NO_NAMESPACE
+namespace H5 {
+#ifndef H5_NO_STD
+	    using namespace std;
+#endif  // H5_NO_STD
+#endif
+/*
 #ifndef H5_NO_STD
 using namespace std;
 #endif
+*/
 
-#include "h5test.h"
-#include "h5cpputil.h"
 
 /*-------------------------------------------------------------------------
  * Function:	test_report
@@ -93,3 +103,29 @@ void issue_fail_msg(const char* where, int line, const char* file_name)
     }
 }
 
+//--------------------------------------------------------------------------
+// Function:    InvalidActionException default constructor
+//--------------------------------------------------------------------------
+InvalidActionException::InvalidActionException():Exception(){}
+
+//--------------------------------------------------------------------------
+// Function:    InvalidActionException overloaded constructor
+//
+// Purpose:	Creates an InvalidActionException with the name of the function,
+//              which the failure should have occurred but didn't, and a 
+//		message explaining why it should fail.
+// Parameters
+//		func_name - IN: Name of the function where failure should occur
+//		message   - IN: Message 
+//--------------------------------------------------------------------------
+InvalidActionException::InvalidActionException(const string func_name, const string message) : Exception(func_name, message) {}
+
+//--------------------------------------------------------------------------
+// Function:    InvalidActionException destructor
+//--------------------------------------------------------------------------
+InvalidActionException::~InvalidActionException() {}
+
+#ifndef H5_NO_NAMESPACE
+} // end namespace
+#endif
+