CG test written and passes i.e. converges with small true residual

in RedBlack MpcDagMpc, Unprec MdagM and Schur red black solver for
each of.

DomainWallFermion
MobiusFermion
MobiusZolotarevFermion
ScaledShamirFermion
ScaledShamirZolotarevFermion

tests/Test_rng_fixed.cc

@@ -0,0 +1,52 @@
+#include <Grid.h>
+#include <parallelIO/GridNerscIO.h>
+
+using namespace std;
+using namespace Grid;
+using namespace Grid::QCD;
+
+int main (int argc, char ** argv)
+{
+  Grid_init(&argc,&argv);
+
+  std::vector<int> latt_size   = GridDefaultLatt();
+  std::vector<int> simd_layout = GridDefaultSimd(4,vComplexF::Nsimd());
+  std::vector<int> mpi_layout  = GridDefaultMpi();
+     
+  GridCartesian     Grid(latt_size,simd_layout,mpi_layout);
+
+  std::vector<int> seeds({1,2,3,4});
+
+  GridSerialRNG            fsRNG;  fsRNG.SeedFixedIntegers(seeds);
+  GridParallelRNG          fpRNG(&Grid);  fpRNG.SeedFixedIntegers(seeds);
+
+  vComplexF tmp; random(fsRNG,tmp);
+  std::cout<<"Random vComplexF (fixed seed)\n"<< tmp<<std::endl;
+  std::cout<<"conjugate(tmp)\n"<< conjugate(tmp)<<std::endl;
+  std::cout<<"conjugate(tmp)*tmp\n"<< conjugate(tmp)*tmp<<std::endl;
+  std::cout<<"innerProduct"<< innerProduct(tmp,tmp)<<std::endl;
+  std::cout<<"Reduce(innerProduct)"<< Reduce(innerProduct(tmp,tmp))<<std::endl;
+
+  SpinMatrix rnd  ; 
+  random(fsRNG,rnd);
+  std::cout<<"Random Spin Matrix (fixed seed)\n"<< rnd<<std::endl;
+
+  SpinVector rv; 
+  random(fsRNG,rv);
+  std::cout<<"Random Spin Vector (fixed seed)\n"<< rv<<std::endl;
+
+  gaussian(fsRNG,rv);
+  std::cout<<"Gaussian Spin Vector (fixed seed)\n"<< rv<<std::endl;
+
+  LatticeColourVector lcv(&Grid);
+
+  LatticeFermion src(&Grid); random(fpRNG,src);
+  std::cout << "src norm : " << norm2(src)<<std::endl;
+  std::cout << "src " << src<<std::endl;
+
+  random(fpRNG,lcv);
+  std::cout<<"Random Lattice Colour Vector (fixed seed)\n"<< lcv<<std::endl;
+
+
+  Grid_finalize();
+}