etcd: implement separate system tests

- add t13_etcd test directory
- etcd will be started for the unit tests and each system test
- etcd will load fixture DB export if requested by the test
- existing tests are reused for etcd testing

system/t13_etcd/publish_drop.py

@@ -0,0 +1,92 @@
+# reuse existing tests:
+from t06_publish.drop import PublishDrop1Test, \
+                             PublishDrop2Test, \
+                             PublishDrop3Test, \
+                             PublishDrop4Test, \
+                             PublishDrop5Test, \
+                             PublishDrop6Test, \
+                             PublishDrop7Test, \
+                             PublishDrop8Test, \
+                             PublishDrop9Test
+
+TEST_IGNORE = ["PublishDrop1Test",
+               "PublishDrop2Test",
+               "PublishDrop3Test",
+               "PublishDrop4Test",
+               "PublishDrop5Test",
+               "PublishDrop6Test",
+               "PublishDrop7Test",
+               "PublishDrop8Test",
+               "PublishDrop9Test"]
+
+
+class PublishDrop1TestEtcd(PublishDrop1Test):
+    """
+    publish drop: existing snapshot
+    """
+    databaseType = "etcd"
+    databaseUrl = "127.0.0.1:2379"
+
+
+class PublishDrop2TestEtcd(PublishDrop2Test):
+    """
+    publish drop: under prefix
+    """
+    databaseType = "etcd"
+    databaseUrl = "127.0.0.1:2379"
+
+
+class PublishDrop3TestEtcd(PublishDrop3Test):
+    """
+    publish drop: drop one distribution
+    """
+    databaseType = "etcd"
+    databaseUrl = "127.0.0.1:2379"
+
+
+class PublishDrop4TestEtcd(PublishDrop4Test):
+    """
+    publish drop: drop one of components
+    """
+    databaseType = "etcd"
+    databaseUrl = "127.0.0.1:2379"
+
+
+class PublishDrop5TestEtcd(PublishDrop5Test):
+    """
+    publish drop: component cleanup
+    """
+    databaseType = "etcd"
+    databaseUrl = "127.0.0.1:2379"
+
+
+class PublishDrop6TestEtcd(PublishDrop6Test):
+    """
+    publish drop: no publish
+    """
+    databaseType = "etcd"
+    databaseUrl = "127.0.0.1:2379"
+
+
+class PublishDrop7TestEtcd(PublishDrop7Test):
+    """
+    publish drop: under prefix with trailing & leading slashes
+    """
+    databaseType = "etcd"
+    databaseUrl = "127.0.0.1:2379"
+
+
+class PublishDrop8TestEtcd(PublishDrop8Test):
+    """
+    publish drop: skip component cleanup
+    """
+    databaseType = "etcd"
+    databaseUrl = "127.0.0.1:2379"
+
+
+class PublishDrop9TestEtcd(PublishDrop9Test):
+    """
+    publish drop: component cleanup after first cleanup skipped
+    """
+    databaseType = "etcd"
+    databaseUrl = "127.0.0.1:2379"