tests: Add a custom script for getting info about Stratis pools

[vojtechtrefny]

There are multiple versions of Stratis in systems we support and it is hard to get all the information to verify test results from the Stratis cmdline utility in a consistent way. This adds a small Python script that uses Stratis DBus API to get the information we need for the tests.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 10.72%. Comparing base (59fd1c6) to head (0124d39).
Report is 46 commits behind head on main.

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Flag	BASE (59fd1c6)	HEAD (0124d39)
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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #522      +/-   ##
==========================================
- Coverage   16.54%   10.72%   -5.83%     
==========================================
  Files           2        8       +6     
  Lines         284     1949    +1665     
  Branches       79        0      -79     
==========================================
+ Hits           47      209     +162     
- Misses        237     1740    +1503     

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[vojtechtrefny]

I am not sure if this is the best place for this "dependency", but pylint is complaining about import error on the import gi line. This is dependency of blivet so it is available on systems with the role (and the test suite) running, but not for the pylint run.

[richm]

The network role also uses import gi and pylint tests pass there.

[vojtechtrefny]

Network role uses it in a try-except block so I guess pylint is OK with that. Anyway installing PyGObject from pypi doesn't work, it's a C extension and it fails to compile. I think skipping the warning is probably the best way to "fix" this?

[richm]

see #522 (comment)

[richm]

to fix the pylint issue:

try:
    import gi

    gi.require_version("GLib", "2.0")
    gi.require_version("Gio", "2.0")

    from gi.repository import GLib, Gio
except ImportError:
    GLib = None
    class GioObj(object): pass
    Gio = GioObj()
    Gio.DBusCallFlags = GioObj()
    Gio.DBusCallFlags.NONE = None

[vojtechtrefny]

Marking as ready for review, tests_stratis.yml now passes on all three systems.

[richm]

[citest]