[PDI-11555] Re-usable TreeBrowser model and transformation utils
[PDI-11555] Add Unit Tests to TreeBrowserModelMapper
Merge pull request #166 from bytekast/PDI-11555

[PDI-11555] Re-usable TreeBrowser Model and Transformation Utils
[PDI-11555] Add negative unit tests to TreeBrowserMapper
Merge pull request #167 from bytekast/PDI-11555

[PDI-11555] Add negative unit tests to TreeBrowserMapper
PDI-11553 - Refactor the accordion-based layout

Initial commit of accordion wizard directive with unit tests.