Add a maven mojo to validate OSGi configurations #178

[cziegeler]

This adds a new mojo to directly validate OSGi configurations inside a project

Description

The mojo allows to scan an expanded repository directory on disk, finds the OSGi configurations and then validates them.

The PR looks large, however the changes to the mojos are minimal:

• some functionality is moved to an abstract mojo class for reuse in different mojos
• new AnalyseConfigsMojo for the new functionality
• core gets a new package with the actual implementation of validating OSGi configurations in a project. This makes the code usable outside of maven
• a new prototype of a cli using above core code. this cli can be run without maven

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[bosschaert]

Hi @cziegeler looks great to me. One suggestion - I see that the new cli doesn't have any unit tests at all. Would it be possible to get some coverage there?

[cziegeler]

Thanks @bosschaert - I've just added a test which tests most of the new code - except for the new third module which I think needs some more love anyway

[bosschaert]

Thanks @cziegeler LGTM 👍