Exception should be recorded as caught rather than thrown

Similar to the fix to HADOOP-657. In file:

hadoop-rel-release-2.7.2/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-sharedcachemanager/src/main/java/org/apache/hadoop/yarn/server/sharedcachemanager/CleanerTask.java

In line 221, the exception was caught rather than thrown.

try {
        store.cleanResourceReferences(key);
} catch (YarnException e) {
        LOG.error("Exception thrown while removing dead appIds.", e);
   }