Fix finding heightmap blend textures

[iche033]

Signed-off-by: Ian Chen [email protected]

🦟 Bug fix

When heightmap models are placed in a custom IGN_GAZEBO_RESOURCE_PATH but their textures are specified using relative paths, ign-rendering / ogre complains about these files not found. This is because they are not located in the standard ogre resource search directories so we need to use common::findFile to get their full paths.

Summary

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
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[codecov]

Codecov Report

Merging #1055 (e1cd402) into heightmap_pos (7e97577) will increase coverage by 0.91%.
The diff coverage is 5.71%.

❗ Current head e1cd402 differs from pull request most recent head 4c21e44. Consider uploading reports for the commit 4c21e44 to get more accurate results

@@                Coverage Diff                @@
##           heightmap_pos    #1055      +/-   ##
=================================================
+ Coverage          63.09%   64.01%   +0.91%     
=================================================
  Files                257      255       -2     
  Lines              20331    19917     -414     
=================================================
- Hits               12828    12750      -78     
+ Misses              7503     7167     -336     

Impacted Files	Coverage Δ
...ins/entity_context_menu/EntityContextMenuPlugin.cc	41.17% <0.00%> (-4.54%)	⬇️
src/gui/plugins/select_entities/SelectEntities.cc	10.04% <0.00%> (-4.42%)	⬇️
src/gui/plugins/spawn/Spawn.cc	10.25% <0.00%> (-0.90%)	⬇️
.../gui/plugins/transform_control/TransformControl.cc	6.97% <0.00%> (+1.50%)	⬆️
...lization_capabilities/VisualizationCapabilities.cc	7.96% <0.00%> (ø)
src/rendering/SceneManager.cc	28.74% <0.00%> (ø)
src/ServerConfig.cc	90.33% <100.00%> (ø)
src/gui/Gui.cc	64.34% <100.00%> (ø)
... and 5 more

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