Enable plugins to create config stores for repository config

Therefore we have to
- add an API to create stores for repository ids, not only for
  repositories,
- make v1 properties available in scm-core
- make sure that properties are extracted from repositories before the
  update step of a plugin runs (this is done by sorting the update steps
  in a way so that "core" update steps are executed before plugin update
  steps with the same version)

scm-webapp/src/main/java/sonia/scm/boot/BootstrapModule.java

@@ -24,6 +24,8 @@ import sonia.scm.store.FileBlobStoreFactory;
 import sonia.scm.store.JAXBConfigurationEntryStoreFactory;
 import sonia.scm.store.JAXBConfigurationStoreFactory;
 import sonia.scm.store.JAXBDataStoreFactory;
+import sonia.scm.update.V1PropertyDAO;
+import sonia.scm.update.xml.XmlV1PropertyDAO;
 
 public class BootstrapModule extends AbstractModule {
 
@@ -60,6 +62,7 @@ public class BootstrapModule extends AbstractModule {
     bind(DataStoreFactory.class, JAXBDataStoreFactory.class);
     bind(BlobStoreFactory.class, FileBlobStoreFactory.class);
     bind(PluginLoader.class).toInstance(pluginLoader);
+    bind(V1PropertyDAO.class, XmlV1PropertyDAO.class);
   }
 
   private <T> void bind(Class<T> clazz, Class<? extends T> defaultImplementation) {