Remove calls to deprecated Throwables.propagate() method

Change-Id: Id48a8f1d4fb02560cfb77108f554556a3cad9b16
diff --git a/utils/misc/src/main/java/org/onlab/util/RetriesExceededException.java b/utils/misc/src/main/java/org/onlab/util/RetriesExceededException.java
new file mode 100644
index 0000000..d815353
--- /dev/null
+++ b/utils/misc/src/main/java/org/onlab/util/RetriesExceededException.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onlab.util;
+
+/**
+ * Exception that indicates the retry threshold has been exceeded.
+ */
+public class RetriesExceededException extends RuntimeException {
+
+    /**
+     * Create a retries exceeded exception.
+     *
+     * @param t Throwable that cased the last iteration to fail
+     */
+    RetriesExceededException(Throwable t) {
+        super(t);
+    }
+}