create admin in the faker for the test suite

install/faker.php

@@ -101,6 +101,10 @@ try {
         ->find();
     $customer->delete();
 
+    $admin = Thelia\Model\AdminQuery::create()
+        ->find();
+    $admin->delete();
+
     $folder = Thelia\Model\FolderQuery::create()
         ->find();
     $folder->delete();
@@ -183,6 +187,17 @@ try {
         ;
     }
 
+    for ($i=0; $i<3; $i++) {
+        $admin = new Thelia\Model\Admin();
+        $admin
+            ->setFirstname($faker->firstname)
+            ->setLastname($faker->lastname)
+            ->setLogin($faker->firstname)
+            ->setPassword('azerty')
+            ->setLocale('en_US')
+            ->save();
+    }
+
     for ($i = 0; $i < 50; $i++) {
         $customer = new Thelia\Model\Customer();
         $customer->createOrUpdate(