Vault Credentials Repository

[mandelsoft]

Description

This PR provides a first version to support HashiCorp Vault as credentials repository for the OCM toolset.

It supports the Key-Value secret engine, only. so far.
Automatic propagation of consumer ids is supported by using the custom meta data feature of the key/value store.

Supported Auth methods are token and approle.

Additionally, the RepositoryType interface for the credential context has been extended to support descriptions.
This way the CLI docu now provides information about the supported credential repository types and their specification format
fields similar to the AccessMethod type descriptions.

Please include a summary of the changes and the related issue. Please also include relevant motivation and context. List any dependencies that are required for this change.

What type of PR is this? (check all applicable)

• 🍕 Feature
• 🐛 Bug Fix
• 📝 Documentation Update
• 🎨 Style
• 🧑‍💻 Code Refactor
• 🔥 Performance Improvements
• ✅ Test
• 🤖 Build
• 🔁 CI
• 📦 Chore (Release)
• ⏩ Revert

Related Tickets & Documents

Closes #540

Screenshots

Added tests?

• 👍 yes
• 🙅 no, because they aren't needed
• 🙋 no, because I need help
• Separate ticket for tests # (issue/pr)

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

Added to documentation?

• 📜 README.md
• 🙅 no documentation needed

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules