[Bug] Tests are not completing due to missing "water" class in reference map

[neteler]

Tests are not completing due to missing "water" class in reference map:

# # run tests with downloaded NC test loaction
  10 | >>> RUN grass -c epsg:3358 /grassdb/nc_spm_empty --exec bash test.sh NC

#12 57.58 ======================================================================
#12 57.58 FAIL: test_color_with_notexisting_category_use_error (test_v_colors_to_rast.TestVColorsToRast.test_color_with_notexisting_category_use_error)
#12 57.58 Test color with not existing category values
#12 57.58 ----------------------------------------------------------------------
#12 57.58 Traceback (most recent call last):
#12 57.58   File "/src/testsuite/test_v_colors_to_rast.py", line 155, in test_color_with_notexisting_category_use_error
#12 57.58     self.assertEquals(
#12 57.58 AssertionError: 'Usin[25 chars]or>\nFEHLER: Class <water> is not in reference[16 chars]1>\n' != 'Usin[25 chars]or>\nERROR: Class <water> is not in reference [15 chars]1>\n'
#12 57.58   Using colors from column <color>
#12 57.58 - FEHLER: Class <water> is not in reference map <refmap_1861>
#12 57.58 ? ----
#12 57.58 + ERROR: Class <water> is not in reference map <refmap_1861>
#12 57.58 ?   +++