Remove calls to deprecated Throwables.propagate() method

Change-Id: Id48a8f1d4fb02560cfb77108f554556a3cad9b16
diff --git a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/TransactionalMapParticipant.java b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/TransactionalMapParticipant.java
index 55f4e24..8837b49 100644
--- a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/TransactionalMapParticipant.java
+++ b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/TransactionalMapParticipant.java
@@ -16,16 +16,6 @@
 
 package org.onosproject.store.primitives.impl;
 
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-import java.util.concurrent.CompletableFuture;
-import java.util.concurrent.ExecutionException;
-import java.util.concurrent.TimeUnit;
-import java.util.concurrent.TimeoutException;
-import java.util.stream.Collectors;
-import java.util.stream.Stream;
-
 import com.google.common.base.MoreObjects;
 import com.google.common.base.Objects;
 import com.google.common.base.Throwables;
@@ -38,6 +28,16 @@
 import org.onosproject.store.service.TransactionalMap;
 import org.onosproject.store.service.Version;
 
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
 import static com.google.common.base.Preconditions.checkNotNull;
 import static com.google.common.base.Preconditions.checkState;
 
@@ -87,7 +87,7 @@
                     } catch (TimeoutException e) {
                         throw new TransactionException.Timeout();
                     } catch (ExecutionException e) {
-                        Throwables.propagateIfPossible(e.getCause());
+                        Throwables.throwIfUnchecked(e);
                         throw new TransactionException(e.getCause());
                     }
                 }