use packaging plugins' Reproducible Builds versions via parent

Author: hboutemy

maven-core/src/main/resources/org/apache/maven/messages/build.properties

@@ -16,7 +16,6 @@
 # under the License.
 
 buildNumber=${buildNumber}
-timestamp=${timestamp}
 version=${project.version}
 distributionId=${distributionId}
 distributionShortName=${distributionShortName}

pom.xml

@@ -25,7 +25,7 @@ under the License.
   <parent>
     <groupId>org.apache.maven</groupId>
     <artifactId>maven-parent</artifactId>
-    <version>33</version>
+    <version>34.RB-SNAPSHOT</version>
     <relativePath>../pom/maven/pom.xml</relativePath>
   </parent>
 
@@ -76,6 +76,7 @@ under the License.
     <maven.site.path>ref/3-LATEST</maven.site.path>
     <checkstyle.violation.ignore>None</checkstyle.violation.ignore>
     <checkstyle.excludes>**/package-info.java</checkstyle.excludes>
+    <project.build.outputTimestamp>2019-09-21T16:17:18Z</project.build.outputTimestamp>
     <buildId>${os.name}-jdk${java.version}</buildId>
   </properties>
 
@@ -568,12 +569,6 @@ under the License.
             </lifecycleMappingMetadata>
           </configuration>
         </plugin>
-        <!-- TODO remove when upgrade to apache-22 parent pom -->
-        <plugin>
-          <groupId>org.apache.maven.plugins</groupId>
-          <artifactId>maven-assembly-plugin</artifactId>
-          <version>3.1.1</version>
-        </plugin>
       </plugins>
     </pluginManagement>
     <plugins>