Fix ldp:contains reference target and add default rdf map for fedora:hasParent,ldp:contains (#16)

islandora/config/install/rdf.mapping.fedora_resource_type.rdf_source.yml

@@ -6,7 +6,7 @@ dependencies:
   module:
     - islandora
 id: fedora_resource_type.rdf_source
-targetEntityType: fedora_resource_type
+targetEntityType: fedora_resource
 bundle: rdf_source
 types:
   - 'schema:Thing'
@@ -34,3 +34,11 @@ fieldMappings:
     properties:
       - 'schema:author'
     mapping_type: rel
+  fedora_has_parent:
+    properties:
+      - 'fedora:hasParent'
+    mapping_type: rel
+  ldp_contains:
+    properties:
+      - 'ldp:contains'
+    mapping_type: rel

islandora/src/Entity/FedoraResource.php

@@ -340,7 +340,7 @@ class FedoraResource extends ContentEntityBase implements FedoraResourceInterfac
       ->setLabel(t('LDP Contains'))
       ->setDescription(t('Contains Fedora Resource.'))
       ->setRevisionable(TRUE)
-      ->setSetting('target_type', 'fedora_resource_type')
+      ->setSetting('target_type', 'fedora_resource')
       ->setSetting('handler', 'default')
       ->setTranslatable(TRUE)
       ->setDisplayOptions('view', array(