Tests: upgrade randomizedtesting-runner to 2.1.10

Closes #43.

(cherry picked from commit 6e5efe6)
(cherry picked from commit 675a860)

Author: dadoonet

pom.xml

@@ -66,6 +66,12 @@ governing permissions and limitations under the License. -->
             <version>1.3.RC2</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>com.carrotsearch.randomizedtesting</groupId>
+            <artifactId>randomizedtesting-runner</artifactId>
+            <version>2.1.10</version>
+            <scope>test</scope>
+        </dependency>
         <dependency>
             <groupId>org.apache.lucene</groupId>
             <artifactId>lucene-test-framework</artifactId>