Set self and schema to readOnly

The "self" and "schema" setions in metadata-namespace,
image-member, task and metadata-objects'schemas should
be readOnly.

Change-Id: I10e919a2e33505468cbd3e0ae49d736917c64884

glance/api/v2/image_members.py

@@ -346,7 +346,10 @@ _MEMBER_SCHEMA = {
             'rejected'
         ]
     },
-    'schema': {'type': 'string'}
+    'schema': {
+        'readOnly': True,
+        'type': 'string'
+    }
 }
 
 

glance/api/v2/metadef_namespaces.py

@@ -715,9 +715,11 @@ def _get_base_properties():
             "format": "date-time"
         },
         "schema": {
+            'readOnly': True,
             "type": "string"
         },
         "self": {
+            'readOnly': True,
             "type": "string"
         },
         "resource_type_associations": {

glance/api/v2/metadef_objects.py

@@ -184,9 +184,11 @@ def _get_base_properties():
             "$ref": "#/definitions/property"
         },
         "schema": {
+            'readOnly': True,
             "type": "string"
         },
         "self": {
+            'readOnly': True,
             "type": "string"
         },
         "created_at": {

glance/api/v2/tasks.py

@@ -374,8 +374,14 @@ _TASK_SCHEMA = {
         "description": _("Datetime when this resource was updated"),
         "type": "string"
     },
-    'self': {'type': 'string'},
-    'schema': {'type': 'string'}
+    'self': {
+        'readOnly': True,
+        'type': 'string'
+    },
+    'schema': {
+        'readOnly': True,
+        'type': 'string'
+    }
 }