Restore inherited 'throws Exception' to doStop overrides to ease subclassing

git-svn-id: svn+ssh://dev.eclipse.org/svnroot/rt/org.eclipse.jetty/jetty/trunk@402 7e9141cc-0065-0410-87d8-b60c137991c4

jetty-servlet/src/main/java/org/eclipse/jetty/servlet/FilterHolder.java

@@ -76,6 +76,7 @@ public class FilterHolder extends Holder
 
     /* ------------------------------------------------------------ */
     public void doStop()
+        throws Exception
     {      
         if (_filter!=null)
         {

jetty-servlet/src/main/java/org/eclipse/jetty/servlet/Holder.java

@@ -85,6 +85,7 @@ public class Holder extends AbstractLifeCycle
     
     /* ------------------------------------------------------------ */
     public void doStop()
+        throws Exception
     {
         if (!_extInstance)
             _class=null;

jetty-servlet/src/main/java/org/eclipse/jetty/servlet/ServletHolder.java

@@ -216,7 +216,7 @@ public class ServletHolder extends Holder implements UserIdentity.Scope, Compara
     
     /* ------------------------------------------------------------ */
     public void doStart()
-    throws Exception
+        throws Exception
     {
         _unavailable=0;
         try
@@ -256,6 +256,7 @@ public class ServletHolder extends Holder implements UserIdentity.Scope, Compara
 
     /* ------------------------------------------------------------ */
     public void doStop()
+        throws Exception
     {
         Object old_run_as = null;
         if (_servlet!=null)