(feat) Add environments to repository model

[jpascoe]

Description

I needed to be able to set the environments for a repository in our corporate JFrog Artifactory. This is a simple addition to the model.

Fixes # (issue)

Type of change

Please delete options that are not relevant.

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

How has it been tested ?

Please describe the tests that you ran to verify your changes. Please also list any relevant details for your test configuration

• [x] I created a new repository specifying the environment and checked the environment was set in Artifactory
• [x] I updated an existing repository specifying the environment and checked the environment was set in Artifactory

Checklist:

• [x] My PR is ready for prime time! Otherwise use the "Draft PR" feature
• [x] All commits have a correct title
• [ ] Readme has been updated
• [x] Quality tests are green (see Codacy)
• [x] Automated tests are green (see pipeline)