Address MR comments

[130s]

Waiting for CI to pass.

[130s]

Only Focal job failed. Not sure so restarted

https://travis-ci.org/github/plusone-robotics/realsense/jobs/756459948#L4514

---------------------------------------------------------

index test name                      score : message        

----- ----------------------------  ------   --------------

0     align_depth_color_1               OK : 

1     align_depth_ir1_1                 OK : 

2     align_depth_ir1_decimation_1      OK : 

3     non_existent_file                 OK : 'num_channels'

4     depth_w_cloud_1                   OK : 

5     points_cloud_1                    OK : 

6     vis_avg_2                     FAILED : 'num_channels'

7     depth_avg_1                       OK : 

8     depth_avg_decimation_1            OK : 

exit (-1)

The command "$_python src/realsense/realsense2_camera/scripts/rs2_test.py --all" exited with 255.
before_cache.1

0.00s$ rm -f  $HOME/.gradle/caches/modules-2/modules-2.lock
before_cache.2

0.00s$ rm -fr $HOME/.gradle/caches/*/plugin-resolution/
cache.2

store build cache

[130s]

CI passed. I guess those tests may be flaky.