Fix python3 functional tests

Fix python3 functional tests to run properly.

Story: 2010867
Task: 48556

Test Plan

PASSED Run tox -e py3

Change-Id: I16b4b9ba23ee5356c2b81daab4c3e74b09d078d9
Signed-off-by: Charles Short <charles.short@windriver.com>

requirements.txt

@@ -6,3 +6,4 @@ pbr>=2.0 # Apache-2.0
 click
 rich
 pyyaml
+PyGObject

test-requirements.txt

@@ -6,8 +6,11 @@ hacking>=3.0,<3.1 # Apache-2.0
 
 coverage>=4.0,!=4.4 # Apache-2.0
 python-subunit>=0.0.18 # Apache-2.0/BSD
-oslotest>=1.10.0 # Apache-2.0
-stestr>=1.0.0 # Apache-2.0
-testtools>=1.4.0 # MIT
+oslotest>=3.8.0 # Apache-2.0
+testresources>=2.0.0 # Apache-2.0/BSD
+testscenarios>=0.4 # Apache-2.0/BSD
+testtools>=2.5.0 # MIT
+pytest
+pylint
 yamllint<1.26.4  # GPLv3
 doc8

tox.ini

@@ -7,17 +7,17 @@ ignore_basepython_conflict = true
 
 [testenv]
 basepython = python3
-usedevelop = true
-sitepacages = False
+usedevelop = True
+sitepackages = True
 setenv =
    PYTHONWARNINGS=default::DeprecationWarning
    OS_STDOUT_CAPTURE=1
    OS_STDERR_CAPTURE=1
    OS_TEST_TIMEOUT=60
-deps = -c{env:UPPER_CONSTRAINTS_FILE:https://opendev.org/starlingx/root/raw/branch/master/build-tools/requirements/debian/upper-constraints.txt}
+deps =
        -r{toxinidir}/test-requirements.txt
        -r{toxinidir}/requirements.txt
-commands = stestr run {posargs}
+commands = pytest -rx  -v ./apt_ostree/tests
 
 [testenv:lower-constraints]
 deps = -c{toxinidir}/lower-constraints.txt