CI fails on testing ROS_REPO

[aremazeilles]

Using github actions for the CI process, following the indications of ros industrial:

name: CI

on: [push, pull_request]

jobs:
  industrial_ci:
    strategy:
      matrix:
        env:
          - {ROS_DISTRO: melodic, ROS_REPO: testing}
          - {ROS_DISTRO: melodic, ROS_REPO: main}
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v1
      - uses: 'ros-industrial/industrial_ci@master'
        env: ${{matrix.env}}

CI fails at the testing level on the testing REPO (details here)
For now the related line is commented in the CI yaml file.