CA-390129: Add the unit test case for the exception handler added in #94

[bernhardkaindl]

This new test confirms that log_exceptions() (added with #94) logs exception messages to the collected xen-bugtool.log file and to stdout.

This PR also has a 2nd commit with a note on how to best skip a pre-commit check for rebasing the PR branch:

• As an exception from the norm of "one PR, one topic", I think that adding this 2nd commit here is fine because both are very small changes, and we don't need a separate PR just to add a hint for developers.

[github-actions[bot]]

Pytest Code coverage comment for Python 2.7

File	Stmts	Miss	Cover	Missing
integration
__init__.py	0	0	100%
conftest.py	18	0	100%
namespace_container.py	35	1	97%	114
test_system_load.py	18	0	100%
test_xenserverconfig.py	15	0	100%
utils.py	68	10	85%	19, 32, 62–65, 71, 91, 94, 151
mocks/xen
__init__.py	0	0	100%
mocks/xen/lowlevel
__init__.py	0	0	100%
mocks/xen/lowlevel/xc
__init__.py	5	0	100%
unit
__init_\.py	0	0	100%
conftest.py	52	9	82%	68, 70–74, 77–79
test_dir_list.py	11	0	100%
test_dump_xapi_procs.py	12	0	100%
test_dump_xapi_rrds.py	65	1	98%	12
test_filter_xapi_clusterd_db.py	78	0	100%
test_fs_funcs.py	14	0	100%
test_load_plugins.py	9	0	100%
test_main.py	134	1	99%	131
test_output.py	73	0	100%
test_process_output.py	11	0	100%
test_snmp.py	15	0	100%
test_xapidb_filter.py	21	0	100%
TOTAL	654	22	96%

Tests	Skipped	Failures	Errors	Time
36	0 :zzz:	0 :x:	0 :fire:	2.260s :stopwatch:

[codecov[bot]]

Codecov Report

Merging #97 (8c29fd5) into master (d0e569d) will increase coverage by 10%. Report is 16 commits behind head on master. The diff coverage is 100%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #97 +/- ## ====================================== + Coverage 88% 98% +10% ====================================== Files 18 18 Lines 2196 665 -1531 ====================================== - Hits 1939 654 -1285 + Misses 257 11 -246 ``` | [Files](https://app.codecov.io/gh/xenserver/status-report/pull/97?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=xenserver) | Coverage Δ | | |---|---|---| | [tests/unit/test\_dump\_xapi\_rrds.py](https://app.codecov.io/gh/xenserver/status-report/pull/97?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=xenserver#diff-dGVzdHMvdW5pdC90ZXN0X2R1bXBfeGFwaV9ycmRzLnB5) | `100% <100%> (ø)` | | ... and [1 file with indirect coverage changes](https://app.codecov.io/gh/xenserver/status-report/pull/97/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=xenserver) | [Flag](https://app.codecov.io/gh/xenserver/status-report/pull/97/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=xenserver) | Coverage Δ | | |---|---|---| | [python2.7](https://app.codecov.io/gh/xenserver/status-report/pull/97/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=xenserver) | `96% <100%> (+9%)` | :arrow_up: | | [python3.10.13](https://app.codecov.io/gh/xenserver/status-report/pull/97/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=xenserver) | `100% <100%> (+12%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=xenserver#carryforward-flags-in-the-pull-request-comment) to find out more.

[github-actions[bot]]

Python3 coverage comment from https://github.com/marketplace/actions/pytest-coverage-comment

File	Stmts	Miss	Cover	Missing
__init__.py	0	0	100%
conftest.py	60	0	100%
test_dir_list.py	11	0	100%
test_dump_xapi_procs.py	12	0	100%
test_dump_xapi_rrds.py	67	0	100%
test_filter_xapi_clusterd_db.py	78	0	100%
test_fs_funcs.py	14	0	100%
test_load_plugins.py	9	0	100%
test_main.py	135	0	100%
test_output.py	73	0	100%
test_process_output.py	11	0	100%
test_snmp.py	15	0	100%
test_xapidb_filter.py	21	0	100%
TOTAL	506	0	100%

Tests	Skipped	Failures	Errors	Time
32	0 :zzz:	0 :x:	0 :fire:	0.980s :stopwatch:

[coveralls]

Pull Request Test Coverage Report for Build 8419657512

Details

• 17 of 17 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.1%) to 95.084%

---

Totals
Change from base Build 8419300538:	0.1%
Covered Lines:	677
Relevant Lines:	712

---

💛 - Coveralls