Wrong initializer for maxResubmissions_ in GGradientDescentFactory

[Ruediger Berlich]

GGradientDescentFactory in Geneva 1.6.1 initializes the parameter maxResubmissions_ to 5 in most cases, except for

GGradientDescentFactory::GGradientDescentFactory(
 const std::string& configFile
 , const execMode& pm
)
        : GOptimizationAlgorithmFactoryT<GOptimizationAlgorithmT<GParameterSet> >(configFile, pm)
 , maxResubmissions_(0)
{ /* nothing */ }