HBASE-23147 Branches-1 shaded artifact for mapreduce integration misses MainClass (#3214)

Co-authored-by: Huang <[email protected]>
Signed-off-by: Duo Zhang <[email protected]>

Author: zhe-huang

hbase-shaded/hbase-shaded-server/pom.xml

@@ -45,6 +45,20 @@
                     <skipAssembly>true</skipAssembly>
                 </configuration>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+                <configuration>
+                    <archive>
+                        <manifest>
+                            <!--Include the Driver class as the 'main'.
+                            Executing the jar will then show a list of the basic MR jobs.
+                            -->
+                            <mainClass>org/apache/hadoop/hbase/mapreduce/Driver</mainClass>
+                        </manifest>
+                    </archive>
+                </configuration>
+            </plugin>
         </plugins>
     </build>
     <dependencies>