Validate that the user requesting a new branch is a packager
Add unit-tests for pkgdb2.ui.package_request_branch
Add unit-test for the add_new_branch_request of the internal API

These tests are making sure all the exceptions are raising as they are
supposed to
Add unit-tests for the search_actions method of the internal API

Double usage test search_actions and add_new_branch_request
Expand the test for search_actions