macOS/Homebrew CI is failing

[traversaro]

See https://github.com/robotology/robotology-superbuild/runs/2453758338?check_suite_focus=true .

2021-04-28T03:05:35.9523030Z CMake Error at CMakeLists.txt:49 (find_package):
2021-04-28T03:05:35.9523740Z   By not providing "FindGazebo.cmake" in CMAKE_MODULE_PATH this project has
2021-04-28T03:05:35.9524520Z   asked CMake to find a package configuration file provided by "Gazebo", but
2021-04-28T03:05:35.9525100Z   CMake did not find one.
2021-04-28T03:05:35.9525360Z 
2021-04-28T03:05:35.9525860Z   Could not find a package configuration file provided by "Gazebo" with any
2021-04-28T03:05:35.9526440Z   of the following names:
2021-04-28T03:05:35.9526710Z 
2021-04-28T03:05:35.9527080Z     GazeboConfig.cmake
2021-04-28T03:05:35.9527900Z     gazebo-config.cmake
2021-04-28T03:05:35.9528210Z 
2021-04-28T03:05:35.9528700Z   Add the installation prefix of "Gazebo" to CMAKE_PREFIX_PATH or set
2021-04-28T03:05:35.9529410Z   "Gazebo_DIR" to a directory containing one of the above files.  If "Gazebo"
2021-04-28T03:05:35.9530160Z   provides a separate development package or SDK, be sure it has been
2021-04-28T03:05:35.9530700Z   installed.

Something seems wrong in Gazebo bottles.

[traversaro]

Indeed, while installing gazebo11 brew prints:

2021-04-28T02:40:32.3420210Z �[32m==>�[0m �[1mInstalling �[32mosrf/simulation/gazebo11�[39m�[0m
2021-04-28T02:40:32.3425110Z �[34m==>�[0m �[1mPouring gazebo11-11.5.0.catalina.bottle.tar.gz�[0m
2021-04-28T02:40:55.0468300Z 🍺  /usr/local/Cellar/gazebo11/11.5.0: 1,285 files, 130MB
2021-04-28T02:41:00.6437410Z �[34m==>�[0m �[1mNo outdated dependents to upgrade!�[0m
2021-04-28T02:41:00.6438540Z �[32m==>�[0m �[1mChecking for dependents of upgraded formulae...�[0m
2021-04-28T02:41:03.8572790Z �[34m==>�[0m �[1mReinstalling 1 broken dependent from source:�[0m
2021-04-28T02:41:03.8573440Z osrf/simulation/gazebo11
2021-04-28T02:41:05.7067690Z �[32m==>�[0m �[1mCaveats�[0m

That is quite similar to the problem osrf/homebrew-simulation#1350 .

[traversaro]

Fixed in osrf/homebrew-simulation#1439 .