Add double precision test to Great Lakes regtest

Author: ukmo-daisybrown

regtests/bin/matrix.base

@@ -1898,6 +1898,8 @@
     echo ' ' >> matrix.body
     echo "$rtst -s MPI -w work_MPI -m grdset_a -f -p $mpi -n $np $ww3 mww3_test_09" >> matrix.body
     echo "$rtst -s MPI_ASCII -w work_MPI_ASCII -m grdset_a -f -p $mpi -n $np $ww3 mww3_test_09" >> matrix.body
+    echo "$rtst -s MPI -w work_MPI_double -i input_double -N -m grdset_a -f -p $mpi -n $np $ww3 mww3_test_09" >> matrix.body
+    echo "$rtst -s MPI_ASCII -w work_MPI_ASCII_double -i input_double -N  -m grdset_a -f -p $mpi -n $np $ww3 mww3_test_09" >> matrix.body
   fi
 
 # Rotated pole grid cases, (ww3_tp2.11 MPI only if requested)

regtests/mww3_test_09/input_double/GtLkHuronBlst.dat

@@ -0,0 +1,88 @@
+    3953 
+    3954 
+    3955 
+    3956 
+    3957 
+    3975 
+    3997 
+    3998 
+    4644 
+    4670 
+    4682 
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+    7651 
+    7654 
+    7658 
+    7661 
+    7664 
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+    7668 
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+    7674 
+    7675 
+    7676 
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+    7680 
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+    7689 
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+    7709 
+    7712 
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+    7716 
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+    7718 
+    7719 
+    7723 
+   12406 
+   12407 
+   12408 
+   12454 
+   12455 
+   12456 
+   12457 
+   12498 
+   12499 
+   12557 
+   12558 
+   12607 
+   12608 
+   12654 
+   12655 
+   13051 
+   13052 
+   13109 
+   13110 
+   13159 
+   13160 
+   13161 
+   16289 
+   16294 
+   16295 
+   16323 
+   16330 
+   16331 
+   18131 
+   18157 
+   18183 
+   18184 
+   18219 
+   18220 
+   18254 
+   18255 
+   18297