CC-3605 : Create 2.1 upgrades

install_minimal/upgrades/airtime-2.1.0/DbUpgrade.php

@@ -11,7 +11,7 @@ class AirtimeDatabaseUpgrade{
     }
 
     private static function task0(){
-        UpgradeCommon::MigrateTablesToVersion(__DIR__, '20120410104441');
+        UpgradeCommon::MigrateTablesToVersion(__DIR__, '20120410143340');
         $sql = "INSERT INTO cc_pref(\"keystr\", \"valstr\") VALUES('scheduled_play_switch', 'on')";
         UpgradeCommon::nonSelectQueryDb($sql);
     }

install_minimal/upgrades/airtime-2.1.0/common/Version20120410143340.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Migrations\AbstractMigration,
+    Doctrine\DBAL\Schema\Schema;
+
+class Version20120410143340 extends AbstractMigration
+{
+    public function up(Schema $schema)
+    {
+
+    }
+
+    public function down(Schema $schema)
+    {
+
+    }
+}