Per #3087, modify the existing point2grid_pb2nc_big_input test in uni…

…t_point2grid.xml by switching from requesting the 'Z2' level to using '*', like all the other simliar point2grid tests. Note that I DID actually test to confirm that 'Z2' and '*' produce the same result. So specifying Z2 does NOT actually filter the obs data as you'd expect it would. With this change, the diff of the output from the test should go away for PR #3088.

internal/test_unit/xml/unit_point2grid.xml

@@ -129,7 +129,7 @@
       &DATA_DIR_OBS;/point_obs/prepbufr.gdas.2017060300.nc \
       G212 \
       &OUTPUT_DIR;/point2grid/pb2nc_TMP_big_input.nc \
-      -field 'name="TMP"; level="Z2";' \
+      -field 'name="TMP"; level="*";' \
       -v 1
     </param>
     <output>