ENSCORESW-318: method fetch_all should not be used in attribute context

always need to specify what type of object the attributes are being fetched for
use fetch_all_by_ method instead (fetch_all_by_Slice, fetch_all_by_Gene...)

modules/Bio/EnsEMBL/DBSQL/AttributeAdaptor.pm

@@ -263,6 +263,10 @@ sub remove_from_{
   return;
 }
 
+sub fetch_all {
+  throw("Use of method fetch_all not supported for attributes");
+}
+
 
 
 sub fetch_all_by_{