Enhance identical contact lookup

#746

test/fixtures/contacts.yml

@@ -9,16 +9,22 @@ john:
   code: john-001
   auth_info: cacb5b
 
-william:
+william: &william
   name: William
   email: william@inbox.test
   phone: '+555.555'
+  fax: +555.555
   ident: 1234
   ident_type: priv
   ident_country_code: US
   registrar: bestnames
   code: william-001
   auth_info: 6573d0
+  street: Main Street
+  zip: 12345
+  city: New York
+  state: New York
+  country_code: US
   statuses:
     - ok
 
@@ -56,17 +62,10 @@ jack:
   auth_info: e2c440
 
 identical_to_william:
-  name: William
-  email: william@inbox.test
-  phone: '+555.555'
-  ident: 1234
-  ident_type: priv
-  ident_country_code: US
+  <<: *william
   registrar: goodnames
   code: william-002
   auth_info: 5ab865
-  statuses:
-    - ok
 
 invalid:
   name: any