This should really be long text

Refs #1422

modules/system/database/migrations/2015_10_01_000016_Db_Cache.php

@@ -9,7 +9,7 @@ class DbCache extends Migration
     {
         Schema::create('cache', function (Blueprint $table) {
             $table->string('key')->unique();
-            $table->text('value');
+            $table->longText('value');
             $table->integer('expiration');
         });
     }