Skip passed results for both report table and fetching logs

[pholica]

Resolves #42

[danmyway]

Works as intended, thanks @pholica!

❯ tesar report --short -l2 -c http://artifacts.osci.redhat.com/testing-farm/9d129ea9-e633-44e6-a6fd-bc84a9ac447c/ --download-logs --skip-pass
Reporting for the requested tasks:
CentOS-8-latest tier0/non-destructive https://api.dev.testing-farm.io/v0.1/requests/9d129ea9-e633-44e6-a6fd-bc84a9ac447c COMPLETE
  > Downloading the log files.
    > Logfiles stored in /var/tmp/tesar/logs/9d129ea9-e633-44e6-a6fd-bc84a9ac447c_logs
+--------------------------------------+-----------------+-----------------+-------------------------------------+--------+
| UUID                                 | Target          | Test Plan       | Test Case                           | Result |
+--------------------------------------+-----------------+-----------------+-------------------------------------+--------+
| 9d129ea9-e633-44e6-a6fd-bc84a9ac447c | CentOS-8-latest |                 |                                     |        |
|                                      |                 | non-destructive |                                     | FAILED |
|                                      |                 |                 | backup_os_release_no_envar          | FAILED |
|                                      |                 |                 | backup_os_release_with_envar        | FAILED |
|                                      |                 |                 | unsuccessful_satellite_registration | FAILED |
|                                      |                 |                 | empty_username_and_password         | FAILED |
+--------------------------------------+-----------------+-----------------+-------------------------------------+--------+

❯ tree /var/tmp/tesar/logs/9d129ea9-e633-44e6-a6fd-bc84a9ac447c_logs/
9d129ea9-e633-44e6-a6fd-bc84a9ac447c_logs/
└── non-destructive
    ├── CentOS-8-latest_backup_os_release_no_envar.log
    ├── CentOS-8-latest_backup_os_release_with_envar.log
    ├── CentOS-8-latest_empty_username_and_password.log
    └── CentOS-8-latest_unsuccessful_satellite_registration.log

[danmyway]

Looks good from my point of view, thanks!
Please just append the CHANGELOG, README and add code comments, we don't need to bulk up my technical debt, thank you!
Also the debug messages would be nice as well :)

[pholica]

Thank you for the review. I'm going to fix as much as it's reasonable before I leave for one week. It's possible that not all of the items will be addressed this (and effectively next week).

[pholica]

Hmmm, the readme update touches also other options as I merely ran the tesar report -h and copied the output so it seems the readme was not updated in one of the previous commits which introduced the change.

[pholica]

@danmyway Please review, I believe it should be now eligible for merge.

[danmyway]

Looks good and the changes are super helpful!
Thanks, @pholica