TUP-2403: refactor the packages for core.ui plugin.
TUP-2403: add the core.ui plugin for camel plugins.
TUP-2403: refactor for core plugin.
TUP-2403: refactor for core.repository plugin.
TUP-2403: refactor for commons.runtime plugin.
TUP-2403: refactor for commons.ui.runtime plugin.
TUP-2403: refactor for metadata.managment.ui plugin.
Merge branch 'feature/6.0/TUP-2403_refactor_package'
Merge pull request #12 from ggu-talend/master

TUP-2403: refactor the duplicated packages.