CephRGWTest: Reorder test cases

* Rename `test_004_migration_and_multisite_failover` to `test_100_migration_and_multisite_failover`
    * This will allow us to insert more multi-site tests after `test_003`,
      before scale-down scenario is run in `test_100_migration_and_multisite_failover`.
* Rename `test_005_virtual_hosted_bucket` to `test_101_virtual_hosted_bucket`.
    * This was previously run after `test_004_migration_and_multisite_failover`.
      So, we rename the test case to `test_101` to keep the same order.

Signed-off-by: Ionut Balutoiu <ibalutoiu@cloudbasesolutions.com>

zaza/openstack/charm_tests/ceph/tests.py

@@ -648,7 +648,7 @@ class CephRGWTest(test_utils.BaseCharmTest):
 
     This Testset is not idempotent, because we don't support scale down from
     multisite to singlesite (yet). Tests can be performed independently.
-    However, If test_004 has completed migration, retriggering the test-set
+    However, If test_100 has completed migration, retriggering the test-set
     would cause a time-out in test_003.
     """
 
@@ -1066,7 +1066,7 @@ class CephRGWTest(test_utils.BaseCharmTest):
         zaza_model.block_until_unit_wl_status(self.secondary_rgw_unit,
                                               'active')
 
-    def test_004_migration_and_multisite_failover(self):
+    def test_100_migration_and_multisite_failover(self):
         """Perform multisite migration and verify failover."""
         container_name = 'zaza-container'
         obj_data = 'Test data from Zaza'
@@ -1224,7 +1224,7 @@ class CephRGWTest(test_utils.BaseCharmTest):
         self.purge_bucket(self.secondary_rgw_app, 'zaza-container')
         self.purge_bucket(self.secondary_rgw_app, 'failover-container')
 
-    def test_005_virtual_hosted_bucket(self):
+    def test_101_virtual_hosted_bucket(self):
         """Test virtual hosted bucket."""
         primary_rgw_unit = zaza_model.get_unit_from_name(self.primary_rgw_unit)
         if primary_rgw_unit.workload_status != "active":