MSOURCES-120 fix reproducible IT: remove plugin version from pom.xml

given that pom.xml is copied into output source jar that must not change
over time

src/it/reproducible/parent-pom.xml

@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Licensed to the Apache Software Foundation (ASF) under one
+  ~ or more contributor license agreements.  See the NOTICE file
+  ~ distributed with this work for additional information
+  ~ regarding copyright ownership.  The ASF licenses this file
+  ~ to you under the Apache License, Version 2.0 (the
+  ~ "License"); you may not use this file except in compliance
+  ~ with the License.  You may obtain a copy of the License at
+  ~
+  ~   http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing,
+  ~ software distributed under the License is distributed on an
+  ~ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+  ~ KIND, either express or implied.  See the License for the
+  ~ specific language governing permissions and limitations
+  ~ under the License.
+  -->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>org.apache.maven.its</groupId>
+  <artifactId>reproducible-parent</artifactId>
+  <version>1.0</version>
+  <packaging>pom</packaging>
+
+  <build>
+    <pluginManagement>
+      <plugins>
+        <plugin>
+          <groupId>org.apache.maven.plugins</groupId>
+          <artifactId>maven-source-plugin</artifactId>
+          <version>@project.version@</version>
+        </plugin>
+      </plugins>
+    </pluginManagement>
+  </build>
+
+</project>

src/it/reproducible/pom.xml

@@ -23,9 +23,13 @@
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
 
-  <groupId>org.apache.maven.its</groupId>
+  <parent>
+    <groupId>org.apache.maven.its</groupId>
+    <artifactId>reproducible-parent</artifactId>
+    <version>1.0</version>
+    <relativePath>./parent-pom.xml</relativePath>
+  </parent>
   <artifactId>reproducible</artifactId>
-  <version>1.0</version>
 
   <name>Test for reproducibility of jar</name>
 
@@ -39,7 +43,6 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-source-plugin</artifactId>
-        <version>@project.version@</version>
         <configuration>
           <archive>
             <manifest>

src/it/reproducible/verify.groovy

@@ -72,6 +72,6 @@ zipFile.close();
 String buf = r.toString()
 println buf
 
-String expectedSha1 = System.properties['os.name'].toLowerCase().contains( 'windows' ) ? 'bb0a48a052defa69102e698aa18c60dea41a546a' : '246b4536d1a7df35b06cea54329077a35e6b07d8'
+String expectedSha1 = System.properties['os.name'].toLowerCase().contains( 'windows' ) ? '3fd3c6db6774db82e78bffc645930a186266e209' : 'bc56380204897bf99dea7849853a7d52f470e7d6'
 
 assert buf.startsWith( "reproducible-1.0-sources.jar sha1 = $expectedSha1" )