error msg
```
2022-09-15 06:23:48 WARNING unit.neutron-api-plugin-ovn/0.install logger.go:60 error: subprocess-exited-with-error
2022-09-15 06:23:48 WARNING unit.neutron-api-plugin-ovn/0.install logger.go:60
2022-09-15 06:23:48 WARNING unit.neutron-api-plugin-ovn/0.install logger.go:60 × pip subprocess to install build dependencies did not run successfully.
2022-09-15 06:23:48 WARNING unit.neutron-api-plugin-ovn/0.install logger.go:60 │ exit code: 1
2022-09-15 06:23:48 WARNING unit.neutron-api-plugin-ovn/0.install logger.go:60 ╰─> [3 lines of output]
2022-09-15 06:23:48 WARNING unit.neutron-api-plugin-ovn/0.install logger.go:60 Looking in links: wheelhouse
2022-09-15 06:23:48 WARNING unit.neutron-api-plugin-ovn/0.install logger.go:60 ERROR: Could not find a version that satisfies the requirement poetry-core (from versions: none)
2022-09-15 06:23:48 WARNING unit.neutron-api-plugin-ovn/0.install logger.go:60 ERROR: No matching distribution found for poetry-core
2022-09-15 06:23:48 WARNING unit.neutron-api-plugin-ovn/0.install logger.go:60 [end of output]
2022-09-15 06:23:48 WARNING unit.neutron-api-plugin-ovn/0.install logger.go:60
2022-09-15 06:23:48 WARNING unit.neutron-api-plugin-ovn/0.install logger.go:60 note: This error originates from a subprocess, and is likely not a problem with pip.
2022-09-15 06:23:48 WARNING unit.neutron-api-plugin-ovn/0.install logger.go:60 error: subprocess-exited-with-error
2022-09-15 06:23:48 WARNING unit.neutron-api-plugin-ovn/0.install logger.go:60
2022-09-15 06:23:48 WARNING unit.neutron-api-plugin-ovn/0.install logger.go:60 × pip subprocess to install build dependencies did not run successfully.
2022-09-15 06:23:48 WARNING unit.neutron-api-plugin-ovn/0.install logger.go:60 │ exit code: 1
2022-09-15 06:23:48 WARNING unit.neutron-api-plugin-ovn/0.install logger.go:60 ╰─> See above for output.
2022-09-15 06:23:48 WARNING unit.neutron-api-plugin-ovn/0.install logger.go:60
2022-09-15 06:23:48 WARNING unit.neutron-api-plugin-ovn/0.install logger.go:60 note: This error originates from a subprocess, and is likely not a problem with pip.
2022-09-15 06:23:48 WARNING unit.neutron-api-plugin-ovn/0.install logger.go:60 Traceback (most recent call last):
2022-09-15 06:23:48 WARNING unit.neutron-api-plugin-ovn/0.install logger.go:60 File "/var/lib/juju/agents/unit-neutron-api-plugin-ovn-0/charm/hooks/install", line 8, in <module>
2022-09-15 06:23:48 WARNING unit.neutron-api-plugin-ovn/0.install logger.go:60 basic.bootstrap_charm_deps()
2022-09-15 06:23:48 WARNING unit.neutron-api-plugin-ovn/0.install logger.go:60 File "/var/lib/juju/agents/unit-neutron-api-plugin-ovn-0/charm/lib/charms/layer/basic.py", line 226, in bootstrap_charm_deps
2022-09-15 06:23:48 WARNING unit.neutron-api-plugin-ovn/0.install logger.go:60 check_call([pip, 'install', '-U', reinstall_flag, '--no-index',
2022-09-15 06:23:48 WARNING unit.neutron-api-plugin-ovn/0.install logger.go:60 File "/usr/lib/python3.10/subprocess.py", line 369, in check_call
2022-09-15 06:23:48 WARNING unit.neutron-api-plugin-ovn/0.install logger.go:60 raise CalledProcessError(retcode, cmd)
2022-09-15 06:23:48 WARNING unit.neutron-api-plugin-ovn/0.install logger.go:60 subprocess.CalledProcessError: Command '['/var/lib/juju/agents/unit-neutron-api-plugin-ovn-0/.venv/bin/pip', 'install', '-U', '--force-reinstall', '--no-index', '--no-cache-dir', '-f', 'wheelhouse', 'idna==3.3', 'zipp==1.2.0', 'debtcollector==2.5.0', 'pbr==5.10.0', 'oslo.config==8.8.0', 'PyYAML==5.3.1', 'Jinja2==3.0.3', 'charmhelpers==1.1.1.dev37', 'pyaml==21.10.1', 'wrapt==1.14.1', 'psutil==5.9.2', 'netaddr==0.7.19', 'stevedore==3.5.0', 'requests==2.27.1', 'oslo.i18n==5.1.0', 'charms.reactive==1.5.0', 'netifaces==0.11.0', 'certifi==2022.6.15.1', 'charset-normalizer==2.0.12', 'urllib3==1.26.12', 'importlib-metadata==3.1.0', 'charms.openstack==0.0.1.dev1', 'dnspython==2.2.1', 'rfc3986==1.5.0']' returned non-zero exit status 1.
```
Fix proposed to branch: master /review. opendev. org/c/openstack /charm- neutron- api-plugin- ovn/+/857931
Review: https:/