Remove calls to deprecated Throwables.propagate() method

Change-Id: Id48a8f1d4fb02560cfb77108f554556a3cad9b16
diff --git a/core/api/src/main/java/org/onosproject/store/primitives/DefaultAtomicCounterMap.java b/core/api/src/main/java/org/onosproject/store/primitives/DefaultAtomicCounterMap.java
index 7fdc2df..b79effc 100644
--- a/core/api/src/main/java/org/onosproject/store/primitives/DefaultAtomicCounterMap.java
+++ b/core/api/src/main/java/org/onosproject/store/primitives/DefaultAtomicCounterMap.java
@@ -126,7 +126,7 @@
         } catch (TimeoutException e) {
             throw new ConsistentMapException.Timeout(name());
         } catch (ExecutionException e) {
-            Throwables.propagateIfPossible(e.getCause());
+            Throwables.throwIfUnchecked(e.getCause());
             throw new ConsistentMapException(e.getCause());
         }
     }