GH-70: Move from hamcrest to assertj in flight-sql

Author: rtadepalli

flight/flight-sql/pom.xml

@@ -127,5 +127,10 @@ under the License.
       <version>1.9.0</version>
       <optional>true</optional>
     </dependency>
+    <dependency>
+      <groupId>org.assertj</groupId>
+      <artifactId>assertj-core</artifactId>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
 </project>