Unpin python3-six for Opensuse image build.
Update helm-toolkit stable commit to merge of this change:
https://review.opendev.org/#/c/803654/
Update the helm installation script to download and install v2.17.0
Fix integration tests by pinning Barbican to stable commit.
Pinn jsonschema to 4.0.0a2 to fix tox tests
Change-Id: I2badd0e2f6c934098f0c9f5ef7e52354756c12e0