Corrected parallel tests in support of https://github.com/Unidata/netcdf-c/issues.321

nc_test/tst_formatx_pnetcdf.c

@@ -9,6 +9,7 @@
 */
 
 #include <nc_tests.h>
+#include "err_macros.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>

nc_test/tst_parallel2.c

@@ -7,6 +7,7 @@
 /*#define USE_MPE 1*/
 
 #include <nc_tests.h>
+#include "err_macros.h"
 #include <mpi.h>
 #include <pnetcdf.h>
 

nc_test/tst_pnetcdf.c

@@ -9,6 +9,7 @@
 */
 
 #include <nc_tests.h>
+#include "err_macros.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>