Fixed few more UI tests

- Fixed following repo tests:
  - `test_remove_repo` : updated locator for remove repository button
  - `test_positive_update_1` added wait_for_ajax()
- Fixed compute resource, media tests.. updated data for these tests
- Blocked sync plan tests and a architecture test with bz ID


The issue is that `repository.search` method returns the searched element only.. and we are performing click() event in the test itself and UI went in to loading state after performing click() event on searched element. So even if I put wait_for_ajax in  repository.search that won't help.