test: removed tests warnings

[sbrunato]

Removes warnings raised during tests

[github-actions]

Benchmark comparison

Compared baseline: origin/develop
Compared candidate: bd2f462

--------------------------------- benchmark: 5 tests, 2 sources ---------------------------------
Name (time in us)                                     baseline Median  candidate Median   ΔMedian
-------------------------------------------------------------------------------------------------
test_benchmark_eoproduct_instantiation                        23.5350           22.8740     -2.8%
test_benchmark_eoproduct_assets_population                    51.8780           51.5060     -0.7%
test_benchmark_import_eodag_cube_subprocess               16,254.7175       15,612.1830     -4.0%
test_benchmark_to_xarray_local                            16,766.0530       13,835.5520    -17.5%
test_benchmark_import_eodag_public_api_subprocess        684,983.5990      689,892.4260     +0.7%
-------------------------------------------------------------------------------------------------

Legend:
  Cyan: reference source for comparison. Green: improvement, Red: regression.
  Δ: percentage change from reference source.