Fixing issue with superfluous exception when installing apps.

Change-Id: Ic802227afc0218ed1999a1509ea0aee62e1d52a3
diff --git a/core/store/dist/src/main/java/org/onosproject/store/app/DistributedApplicationStore.java b/core/store/dist/src/main/java/org/onosproject/store/app/DistributedApplicationStore.java
index 1f0d028..3793099 100644
--- a/core/store/dist/src/main/java/org/onosproject/store/app/DistributedApplicationStore.java
+++ b/core/store/dist/src/main/java/org/onosproject/store/app/DistributedApplicationStore.java
@@ -163,6 +163,9 @@
                     try {
                         log.info("Sending bits for application {}", name);
                         return toByteArray(getApplicationInputStream(name));
+                    } catch (ApplicationException e) {
+                        log.warn("Bits for application {} are not available on this node yet", name);
+                        return null;
                     } catch (IOException e) {
                         throw new StorageException(e);
                     }