Fix handling of ProviderException

[lpramuk]

Fixes #172
Fixes #146

Fixes typos and stylecheck
Updates setup.cfg

(no squash please)

[lpramuk]

Non-existing workflow name

$ broker checkout --workflow blahblah
[INFO 230118 16:23:44] Using provider AnsibleTower to checkout
[INFO 230118 16:23:44] Using token authentication
[ERROR 230118 16:23:46] ProviderError: AnsibleTower encountered the following error: Workflow not found by name: blahblah
$ echo $?
7

No template found

$ broker checkout --workflow deploy-base-rhel --deploy_rhel_version 11
[INFO 230118 16:25:23] Using provider AnsibleTower to checkout
[INFO 230118 16:25:23] Using token authentication
[INFO 230118 16:25:27] Waiting for job: 
    API: https://infra-ansible-tower-01/api/v2/workflow_jobs/387213/
    UI: https://infra-ansible-tower-01/#/jobs/workflow/387213/output
[ERROR 230118 16:26:01] ProviderError: AnsibleTower encountered the following error: {'job': 'satlab-tower-deploy-version-choice', 'task': 'Take Deploy Workflow inputs and output correct set-stats for the remainder of workflow', 'reason': 'No template found for passed arguments'}
$ echo $?
7

Partial success for multiple instances (by deleting 2 VMs)

$ broker checkout --workflow deploy-base-rhel -c 10 
...
[ERROR 230118 16:55:53] ProviderError: AnsibleTower encountered the following error: {'job': 'postdeploy-base-rhel-jt', 'task': 'Output deployed hosts', 'reason': "The task includes an option with an undefined variable. The error was: 'vminfo' is undefined\n\nThe error appears to be in '/runner/project/roles/workflow-output-deploy-results/tasks/main.yml': line 11, column 5, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n  block:\n  - name: Add VM FQDNs to display\n    ^ here\n"}
[INFO 230118 16:56:28] Host: dhcp-2-221.vms
[INFO 230118 16:56:28] Host: dhcp-3-26.vms
[INFO 230118 16:56:29] Host: dhcp-2-71.vms
[ERROR 230118 16:56:29] ProviderError: AnsibleTower encountered the following error: {'reason': 'Unable to determine failure cause for deploy-base-rhel ar /api/v2/workflow_jobs/387220/'}
[INFO 230118 16:56:30] Host: dhcp-2-28.vms
[INFO 230118 16:56:30] Host: dhcp-3-189.vms
[INFO 230118 16:56:30] Host: dhcp-3-56.vms
[INFO 230118 16:56:31] Host: dhcp-2-234.vms
[INFO 230118 16:56:32] Host: dhcp-2-171.vms
$ echo $?
7

[lpramuk]

$ pytest tests/functional/test_satlab.py 
=========================================== test session starts ============================================
platform linux -- Python 3.11.1, pytest-7.2.1, pluggy-1.0.0 -- /home/lpramuk/.virtualenvs/b/bin/python
cachedir: .pytest_cache
rootdir: /home/lpramuk/git/SatelliteQE/broker, configfile: pytest.ini
collected 11 items

tests/functional/test_satlab.py::test_checkout_scenarios[args_file0] PASSED                          [  9%]
tests/functional/test_satlab.py::test_checkout_scenarios[args_file1] PASSED                          [ 18%]
tests/functional/test_satlab.py::test_checkout_scenarios[args_file2] PASSED                          [ 27%]
tests/functional/test_satlab.py::test_checkout_scenarios[args_file3] PASSED                          [ 36%]
tests/functional/test_satlab.py::test_execute_scenarios[args_file0] PASSED                           [ 45%]
tests/functional/test_satlab.py::test_execute_scenarios[args_file1] PASSED                           [ 54%]
tests/functional/test_satlab.py::test_inventory_sync PASSED                                          [ 63%]
tests/functional/test_satlab.py::test_workflows_list PASSED                                          [ 72%]
tests/functional/test_satlab.py::test_workflow_query PASSED                                          [ 81%]
tests/functional/test_satlab.py::test_tower_host PASSED                                              [ 90%]
tests/functional/test_satlab.py::test_tower_host_mp PASSED                                           [100%]

=============================== 11 passed, 12 warnings in 3670.27s (1:01:10) ===============================

[JacobCallahan]

ACK, thanks for the thorough PR!