HDDS-645. Enable OzoneFS contract tests by default.

Contributed by Arpit Agarwal.

hadoop-ozone/ozonefs/pom.xml

@@ -102,6 +102,15 @@
           </execution>
         </executions>
       </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-surefire-plugin</artifactId>
+        <configuration>
+          <includes>
+            <include>ITestOzoneContract*.java</include>
+          </includes>          
+        </configuration>
+      </plugin>      
     </plugins>
   </build>