[FLINK-23375][connector/jdbc] Build JDBC test jar.
diff --git a/flink-connector-jdbc/pom.xml b/flink-connector-jdbc/pom.xml
index 4edd126..3c9dd1f 100644
--- a/flink-connector-jdbc/pom.xml
+++ b/flink-connector-jdbc/pom.xml
@@ -190,6 +190,18 @@
<reuseForks>false</reuseForks>
</configuration>
</plugin>
+
+ <plugin>
+ <groupId>org.apache.maven.plugins</groupId>
+ <artifactId>maven-jar-plugin</artifactId>
+ <executions>
+ <execution>
+ <goals>
+ <goal>test-jar</goal>
+ </goals>
+ </execution>
+ </executions>
+ </plugin>
</plugins>
</build>
</project>