FIX - WMS returns wrong result for coverage has geo extents less than its pyramid

[Bang Pham Huu]

For example, coverage CLMS_Grassland_GRA_10m has geo extent:

Lat: [27.042738498772914, 72.21573849877291]
Lon: [-31.90040474382762, 46.19489525617238]

and its pyramid member CLMS_Grassland_GRA_100m_4 has geo extent:

Lat: [24.28426966834437012, 72.66326966834436]
Lon: [-56.50514190170437, 72.9058580982956189]

then this WMS request will return wrong result (it is stretched):

curl 'http://localhost:8080/rasdaman/ows?service=WMS&request=GetMap&version=1.3.0&transparent=TRUE&layers=CLMS_Grassland_GRA_10m&styles=&format=image/png&width=256&height=256&crs=EPSG:4326&bbox=14,36,66,72.0' -o local_base_subset.png