Fix location of Grid.h and remove reference to QCD namespace

Hadrons/Utilities/Contractor.cc

@@ -34,7 +34,6 @@ See the full license in the file "LICENSE" in the top level distribution directo
 #include <Hadrons/TimerArray.hpp>
 
 using namespace Grid;
-using namespace QCD;
 using namespace Hadrons;
 
 // Separator to be used between contraction terms only (underscores elsewhere)

Hadrons/Utilities/HadronsXmlValidate.cc

@@ -32,7 +32,6 @@ See the full license in the file "LICENSE" in the top level distribution directo
 #include <string>
 
 using namespace Grid;
-using namespace QCD;
 using namespace Hadrons;
 
 // Does the specified file exist?