DATACMNS-90 - Support old EnableXXXRepository annotations that do not yet allow to configure the handling of nested repositories.

Previously a call to attributes.getBoolean(…) resulted in a NPE if a EnableXXXRepository annotation of a store (Neo4J in that case ) did not have the required property yet. With the added check we are safe again.

src/main/java/org/springframework/data/repository/config/AnnotationRepositoryConfigurationSource.java

@@ -231,6 +231,6 @@ public class AnnotationRepositoryConfigurationSource extends RepositoryConfigura
 	 */
 	@Override
 	public boolean shouldConsiderNestedRepositories() {
-		return attributes.getBoolean(CONSIDER_NESTED_REPOSITORIES);
+		return attributes.containsKey(CONSIDER_NESTED_REPOSITORIES) && attributes.getBoolean(CONSIDER_NESTED_REPOSITORIES);
 	}
 }