Do not apply local naming conventions to records with no admin info

There's no way to decide what to do, and without handling this case the
API will return an error.

middleware/localNamingConventions.js

@@ -23,6 +23,9 @@ function applyLocalNamingConventions(req, res, next) {
 
   // loop through data items and flip relevant number/street
   res.data.filter(function(place){
+    // do nothing for records with no admin info
+    if (!place.parent || !place.parent.country_a) { return false; }
+
     // relevant for some countries
     var flip = place.parent.country_a.some(function(country) {
       return _.includes(flipNumberAndStreetCountries, country);

test/unit/middleware/localNamingConventions.js

@@ -77,8 +77,21 @@ module.exports.tests.flipNumberAndStreet = function(test, common) {
     }
   };
 
+  var unknownCountryAddress = {
+    '_id': 'test4',
+    '_type': 'test',
+    'name': { 'default': '123 Main Street' },
+    'center_point': { 'lon': 30.1, 'lat': -50 },
+    'address_parts': {
+       'number': '123',
+       'street': 'Main Street'
+    },
+    'parent': {
+    }
+  };
+
   var req = {},
-      res = { data: [ ukAddress, deAddress, nlAddress ] },
+      res = { data: [ ukAddress, deAddress, nlAddress, unknownCountryAddress ] },
       middleware = localNamingConventions();
 
   test('flipNumberAndStreet', function(t) {
@@ -96,6 +109,10 @@ module.exports.tests.flipNumberAndStreet = function(test, common) {
       // this definition comes from pelias configuration
       t.equal( res.data[2].name.default, 'Keizersgracht 117', 'flipped name' );
 
+      // addresses without a known country (either due to missing data or admin lookup
+      // being disabled), don't have the name flipped
+      t.equal( res.data[3].name.default, '123 Main Street', 'standard name');
+
       t.end();
     });
   });