FIX - condense return incorrect result for mosaic TIFF files

[Bang Pham Huu]

Check coverage at systemtest/30-wcstimport/testdata/120-wcs_metadata_irregular_time_series

with this rasql query generated from WCPS query:

for c in (test_wcs_metadata_irregular_time_series_OLD_RE)

return encode(
condense + 
over $pt t (imageCrsDomain(c, ansi))
using c[ansi($pt)],

"png")

SELECT encode(CONDENSE + OVER pt IN [-3:0]  USING c[pt[0],-33:10,0:35], "png")
 FROM test_wcs_metadata_irregular_time_series AS c

it returns an incorrect result (3D → 2D) compared two the one imported with 2D mosaic recipe.

[Peter Baumann]

Ticket retargeted after milestone closed