Fix for tox4 and setuptools

- Disable auto discovery in setuptools
This is to avoid issues with latest setuptools after version 61.0
For more info see [1]
- add bash script to allowlist in tox.ini
- use default size for vm memory

[1] https://github.com/pypa/setuptools/issues/3197

Change-Id: Iae24917add1aae6b1ed46dba0d2c270b39c5698c

setup.py

@@ -17,4 +17,5 @@ import setuptools
 
 setuptools.setup(
     setup_requires=['pbr>=2.0.0'],
+    py_modules=[],
     pbr=True)

tox.ini

@@ -44,6 +44,7 @@ deps =
     pycodestyle>=2.0.0,<3.0.0 # MIT
     doc8>=0.8.1 # Apache-2.0
 allowlist_externals = bash
+                      {toxinidir}/tools/run_bashate.sh
 commands =
   flake8 {posargs:ironic_python_agent examples}
   # Run bashate during pep8 runs to ensure violations are caught by

zuul.d/ironic-python-agent-jobs.yaml

@@ -21,7 +21,6 @@
       devstack_localrc:
         IRONIC_BUILD_DEPLOY_RAMDISK: True
         IRONIC_VM_COUNT: 2
-        IRONIC_VM_SPECS_RAM: 2750
         # This matches the default in ironic-base, specifying for clarity
         IRONIC_RAMDISK_TYPE: dib
       devstack_services: