Use default config in search and autcomplete tests

The configurable boosts feature can case other unit tests to fail if a
user has customizations in their `pelias.json`.

This adds proxyquire to all tests that might be affected, which force
the default config, preventing such failures.

test/unit/query/autocomplete.js

@@ -1,4 +1,14 @@
-var generate = require('../../../query/autocomplete');
+const proxyquire = require('proxyquire').noCallThru();
+const realPeliasConfig = require('pelias-config');
+const defaultPeliasConfig = {
+  generate: function() {
+    return realPeliasConfig.defaults;
+  }
+};
+
+var generate = proxyquire('../../../query/autocomplete', {
+  'pelias-config': defaultPeliasConfig
+});
 
 module.exports.tests = {};
 

test/unit/query/search_original.js

@@ -1,4 +1,14 @@
-var generate = require('../../../query/search_original');
+const proxyquire = require('proxyquire').noCallThru();
+const realPeliasConfig = require('pelias-config');
+const defaultPeliasConfig = {
+  generate: function() {
+    return realPeliasConfig.defaults;
+  }
+};
+
+var generate = proxyquire('../../../query/search_original', {
+  'pelias-config': defaultPeliasConfig
+});
 
 module.exports.tests = {};