Back out of pom change due to unknown test issue?

Author: aarondav

network/common/pom.xml

@@ -50,7 +50,6 @@
     <dependency>
       <groupId>com.google.guava</groupId>
       <artifactId>guava</artifactId>
-      <version>11.0.2</version> <!-- yarn 2.4.0's version -->
       <scope>provided</scope>
     </dependency>
 

network/shuffle/pom.xml

@@ -51,7 +51,6 @@
     <dependency>
       <groupId>com.google.guava</groupId>
       <artifactId>guava</artifactId>
-      <version>11.0.2</version> <!-- yarn 2.4.0's version -->
       <scope>provided</scope>
     </dependency>
 

network/shuffle/src/test/java/org/apache/spark/network/shuffle/ExternalShuffleSecuritySuite.java

@@ -84,6 +84,7 @@ private void validate(String appId, String secretKey) {
     // Registration either succeeds or throws an exception.
     client.registerWithShuffleServer(TestUtils.getLocalHost(), server.getPort(), "exec0",
       new ExecutorShuffleInfo(new String[0], 0, ""));
+    client.close();
   }
 
   /** Provides a secret key holder which always returns the given secret key, for a single appId. */