FELIX-2556: Don't try to stop fragment bundles

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@1022686 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/fileinstall/src/main/java/org/apache/felix/fileinstall/internal/DirectoryWatcher.java b/fileinstall/src/main/java/org/apache/felix/fileinstall/internal/DirectoryWatcher.java
index ffe7398..b455d82 100644
--- a/fileinstall/src/main/java/org/apache/felix/fileinstall/internal/DirectoryWatcher.java
+++ b/fileinstall/src/main/java/org/apache/felix/fileinstall/internal/DirectoryWatcher.java
@@ -1088,7 +1088,10 @@
         // when refreshing packages).
         if (startBundles)
         {
-            bundle.stop(Bundle.STOP_TRANSIENT);
+            if (!isFragment(bundle)) 
+            {
+                bundle.stop(Bundle.STOP_TRANSIENT);
+            }
         }
     }