fix multiple init

tests/lbpm_electrokinetic_SingleFluid_simulator.cpp

@@ -23,15 +23,13 @@ using namespace std;
 int main(int argc, char **argv)
 {
     // Initialize MPI and error handlers
-    Utilities::startup( argc, argv );
-
-    { // Limit scope so variables that contain communicators will free before MPI_Finialize
-    	// Initialize MPI
     	Utilities::startup( argc, argv );
     	Utilities::MPI comm( MPI_COMM_WORLD );
     	int rank = comm.getRank();
     	int nprocs = comm.getSize();
 
+    { // Limit scope so variables that contain communicators will free before MPI_Finialize
+
         if (rank == 0){
             printf("********************************************************\n");
             printf("Running LBPM electrokinetic single-fluid solver \n");