[issue 80] - Add EAP 7 legacy s2i build provisioner

[fabiobrz]

Description

Porting the EAP 7 legacy s2i build provisioner that is still used by EAP testing pipelines.
Fix #80 - requires #104

Type of change

• Bug fix (non-breaking change which fixes an issue)
• Feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change
• Chore (non-breaking change which doesn't affect codebase;
  test, version modification, documentation, etc.)

Checklist

• Code contributed by me aligns with current project license: Apache 2.0
• Pull Request contains a description of the changes
• Pull Request does not include fixes for multiple issues/topics
• Code is self-descriptive and/or documented
• I have implemented unit tests to cover my changes
• I tested my code in OpenShift

[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[fabiobrz]

/test all

[fabiobrz]

/test all

[fabiobrz]

/test all

[marekkopecky]

Thank you for this MR, merging.