title: Placing repository impl in not base-package
body: <p>I wan't separate my custom repository implementation from domain package. And, probablym some common interfaces. For example I want have structure like</p>
  
  <pre><code>  com
         domain
              Foo
              FooRepository
         common
              Bar
         persistence
              BarImpl
  
  interface FooRepository extends Bar{}
  
  &lt;jpa:repositories base-package="com.domain" /&gt; // smt else?
  </code></pre>
  
  <p>How I should config this?</p>