Allow testing ordering to be specified as declaration, lexicographical, or random. Allow random seed to be specified

include/catch_runner.hpp

@@ -170,6 +170,9 @@ namespace Catch {
             try
             {
                 config(); // Force config to be constructed
+
+                std::srand( m_configData.rngSeed );
+
                 Runner runner( m_config );
 
                 // Handle list request