Merge pull request #88 from wxmerkt/topic/fix-test-warnings

[tiago_description] Define missing materials to fix test warnings
9 jobs for devel in 1 minute and 35 seconds (queued for 2 seconds)
Status Name Job ID Coverage
  Test
passed doc-coverage #120959

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passed format #120960

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passed robotpkg-example-robot-data-18.04-release #120952

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passed robotpkg-py-example-robot-data-py2-18.04-release #120953

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passed robotpkg-py-example-robot-data-py3-18.04-release #120954

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passed robotpkg-py-example-robot-data-py3-20.04-release #120955

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passed robotpkg-py-example-robot-data-py3-buster-release #120956

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passed robotpkg-py-example-robot-data-py3-ferrum-release #120957

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passed robotpkg-py-example-robot-data-py3-stretch-release #120958

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