Update flux and helm-operator

Closes #661 and #662

See merge request openappstack/openappstack!333

Resolve "use existing PVC for single-sign-on installation"

Closes #477

See merge request openappstack/openappstack!337

Allow k3s kubelet args

See merge request openappstack/openappstack!335

Closes: #477

Fixes: #662

Resolve "Flux: Invalid revision range"

Closes #657

See merge request openappstack/openappstack!328

Resolve "Rocket Chat behave test fails to match page title"

Closes #659

See merge request openappstack/openappstack!329

The title varies so we don't try to match it exactly.

Fixes #659

Fixes: #657

Resolve "flux-custom doesn't install"

Closes #652

See merge request openappstack/openappstack!326

Fixes: #652

Resolve "Don't install local-path-provisioner is disabled from applications"

Closes #638 and #651

See merge request openappstack/openappstack!325

Closes: #638

Resolve "Pin k3s version"

Closes #656

See merge request openappstack/openappstack!327

Closes: #656

Resolve "API error while creating droplet"

Closes #646

See merge request openappstack/openappstack!324

update nextcloud chart

See merge request openappstack/openappstack!322

update wordpress chart to 0.1.4

See merge request openappstack/openappstack!323

make sure nextcloud email settings are not necessary if smtp is not enabled

See merge request openappstack/openappstack!321

Resolve "Document how to customize openappstack"

Closes #285

See merge request openappstack/openappstack!318

Closes: #285

Resolve "Separate cluster installation from OAS config in bootstrap"

Closes #121

See merge request openappstack/openappstack!312

Horizontal CI lanes for each app and increase test timeouts in CI

Closes #595 and #633

See merge request openappstack/openappstack!316

Also: Make pylint happy.

- Run individual helmrelease, app readiness and behave tests for each app
- Increase job timeout for helmreleases and behave tests

Fixes: #633, #595

Allow second, custom flux instance

See merge request openappstack/openappstack!313

Fix install docs

See merge request openappstack/openappstack!315