Add mariadb backup and replication tests

Change-Id: Iea620b256dfa037ea9780273e654850cd0a6f124

.zuul.yaml

@@ -6,11 +6,11 @@
       - tempest-plugin-jobs
     check:
       jobs:
-        - trove-tempest-mysql-5.7.29:
+        - trove-tempest-ubuntu-base-mysql5.7:
             voting: false
     gate:
       jobs:
-        - trove-tempest-mysql-5.7.29:
+        - trove-tempest-ubuntu-base-mysql5.7:
             voting: false
     experimental:
       jobs:

trove_tempest_plugin/tests/scenario/test_backup.py

@@ -165,3 +165,7 @@ class TestBackupPostgreSQL(base_backup.TestBackupBase):
     @decorators.idempotent_id("ec387400-f412-11ea-a950-00224d6b7bc1")
     def test_backup_incremental(self):
         self.backup_incremental_test()
+
+
+class TestBackupMariaDB(TestBackupMySQL):
+    datastore = 'mariadb'

trove_tempest_plugin/tests/scenario/test_replication.py

@@ -183,3 +183,7 @@ class TestReplicationPostgreSQL(base_replication.TestReplicationBase):
     @decorators.idempotent_id("2f37f064-f418-11ea-a950-00224d6b7bc1")
     def test_replication(self):
         self.replication_test()
+
+
+class TestReplicationMariaDB(TestReplicationMySQL):
+    datastore = 'mariadb'