Remove ddl-ee dependencies

Replace ddl-ee fallback logic with direct ddl require in cluster.lua
and examples.

Author: Alex Vakhov

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## 0.0.13
+
+- `Remove ddl-ee dependencies`
+
 ## 0.0.12
 
 - `Support to use ddl-ee`

examples/cartridge-simple/app/test_data.lua

@@ -1,10 +1,4 @@
-local ddl
-local ok, rc = pcall(require, 'ddl-ee')
-if ok then
-    ddl = rc
-else
-    ddl = require('ddl')
-end
+local ddl = require('ddl')
 
 local log = require('log')
 

graphqlapi/cluster.lua

@@ -7,13 +7,7 @@ local vshard = require('vshard')
 
 local utils = require('graphqlapi.utils')
 
-local ddl
-local ok, rc = pcall(require, 'ddl-ee')
-if ok then
-    ddl = rc
-else
-    ddl = require('ddl')
-end
+local ddl = require('ddl')
 
 local _replicas = {}