Run schema callback on nextTick

lib/adapters/memory.js

@@ -1,6 +1,6 @@
 exports.initialize = function initializeSchema(schema, callback) {
     schema.adapter = new Memory();
-    callback();
+    process.nextTick(callback);
 };
 
 function Memory() {

lib/adapters/mongoose.js

@@ -27,7 +27,7 @@ exports.initialize = function initializeSchema(schema, callback) {
     }
     schema.client = mongoose.connect(schema.settings.url);
     schema.adapter = new MongooseAdapter(schema.client);
-    callback();
+    process.nextTick(callback);
 };
 
 function MongooseAdapter(client) {

lib/adapters/mysql.js

@@ -15,7 +15,7 @@ exports.initialize = function initializeSchema(schema, callback) {
     });
 
     schema.adapter = new MySQL(schema.client);
-    callback();
+    process.nextTick(callback);
 };
 
 function MySQL(client) {

lib/adapters/neo4j.js

@@ -6,7 +6,7 @@ var neo4j = require('./neo4j-lib');
 exports.initialize = function initializeSchema(schema, callback) {
     schema.client = new neo4j.GraphDatabase(schema.settings.url);
     schema.adapter = new Neo4j(schema.client);
-    callback();
+    process.nextTick(callback);
 };
 
 function Neo4j(client) {

lib/adapters/sequelize.js

@@ -2,7 +2,7 @@ var Sequelize = require('sequelize');
 
 exports.initialize = function initializeSchema(schema, callback) {
     schema.adapter = new SequelizeAdapter(schema);
-    callback();
+    process.nextTick(callback);
 };
 
 function SequelizeAdapter(schema) {