[MSITE-855] make build Reproducible

pom.xml

@@ -25,7 +25,7 @@ under the License.
   <parent>
     <groupId>org.apache.maven.plugins</groupId>
     <artifactId>maven-plugins</artifactId>
-    <version>33</version>
+    <version>34</version>
     <relativePath />
   </parent>
 
@@ -210,6 +210,7 @@ under the License.
     <pmdPluginVersion>3.11.0</pmdPluginVersion>
     <projectInfoReportsPluginVersion>2.7</projectInfoReportsPluginVersion>
     <surefirePluginVersion>2.22.1</surefirePluginVersion>
+    <project.build.outputTimestamp>2020-02-14T20:39:59Z</project.build.outputTimestamp>
   </properties>
 
   <dependencies>
@@ -547,6 +548,7 @@ under the License.
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-shade-plugin</artifactId>
+        <version>3.2.2</version><!-- TODO remove when upgrading parent to 35 -->
         <executions>
           <execution>
             <phase>package</phase>