[FLINK-3285][maven] Skip deployment of flink-java8 module

This closes #1547

flink-java8/pom.xml

@@ -163,6 +163,15 @@ under the License.
 						</dependency>
 					</dependencies>
 				</plugin>
+				<plugin>
+					<!-- Skip the deployment of the Java8 artifact -->
+					<groupId>org.apache.maven.plugins</groupId>
+					<artifactId>maven-deploy-plugin</artifactId>
+					<version>2.4</version><!--$NO-MVN-MAN-VER$-->
+					<configuration>
+						<skip>true</skip>
+					</configuration>
+				</plugin>
 				<!--This plugin's configuration is used to store Eclipse m2e settings only. It has no influence on the Maven build itself.-->
 				<plugin>
 					<groupId>org.eclipse.m2e</groupId>