JAVA: Exclude TestMetadataTestCase from test cases.

Review URL: https://codereview.appspot.com/5847065

java/pom.xml

@@ -88,9 +88,12 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
-        <version>2.10</version>
+        <version>2.12</version>
         <configuration>
           <forkMode>never</forkMode>
+          <includes>
+            <include>**/*Test.java</include>
+          </includes>
         </configuration>
       </plugin>
       <plugin>