Normalize title of test external_ca in prci-definition
Use a consistent way to label the tests. As a result, replace external_ca_1 with test_external_ca_TestExternalCA and external_ca_2 with test_external_ca_TestSelfExternalSelf to better reflect which subtest is executed.
Issue : freeipa/freeipa-pr-ci#336
Signed-off-by: Gaurav Talreja <gtalreja@redhat.com>
Reviewed-By: Sumedh Sidhaye <ssidhaye@redhat.com>
Reviewed-By: Florence Blanc-Renaud <flo@redhat.com>