extend the aquifer model so that it can initialize itself

nothing is perfect on first try...

ebos/eclbaseaquifermodel.hh

@@ -57,6 +57,13 @@ public:
         : simulator_(simulator)
     {}
 
+    /*!
+     * \brief Called once the problem has been fully initialized and the initial
+     *        condition has been applied.
+     */
+    void initialSolutionApplied()
+    { }
+
     /*!
      * \brief This method is called when a new episode (report step) starts.
      */