Wrap migration in a transaction

The migration may or or may not error, as it has values like `$userTable` that are not guaranteed to be provided.

Author: dboskovic

src/views/generators/migration.blade.php

@@ -12,6 +12,9 @@ class EntrustSetupTables extends Migration
      */
     public function up()
     {
+
+        DB::beginTransaction();
+
         // Create table for storing roles
         Schema::create('{{ $rolesTable }}', function (Blueprint $table) {
             $table->increments('id');
@@ -55,6 +58,8 @@ public function up()
 
             $table->primary(['permission_id', 'role_id']);
         });
+
+        DB::commit();
     }
 
     /**