Support for prioirityClass

[michelefa1988]

Can you please update your helm charts to support priority class

Let me know if you need any help with PRs

[yvoswillens]

Hi @michelefa1988

Could you prepare a PR for this?

Thnx
Yvo

[michelefa1988]

@yvoswillens PR https://github.com/flowable/helm/pull/10/files