BAEL-5246: pom cleanup (#4620)

* BAEL-5246: round 1 of pom cleanup - upto "jersey" project

* BAEL-5246: Initial pass for pom cleanup - upto spring-cloud

* BAEL-5246: pom cleanup upto testing-modules/junit5

* BAEL-5246: pom cleanup - upto xstream

* BAEL-5246: pom cleanup - last round (before review)

persistence-modules/spring-data-dynamodb/pom.xml

@@ -1,5 +1,5 @@
 <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">
+    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>com.baeldung</groupId>
     <artifactId>spring-boot-dynamodb</artifactId>
@@ -157,7 +157,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-dependency-plugin</artifactId>
-                <version>2.10</version>
+                <version>${maven-dependency-plugin.version}</version>
                 <executions>
                     <execution>
                         <id>copy-dependencies</id>
@@ -218,7 +218,6 @@
         </pluginRepository>
     </pluginRepositories>
 
-
     <properties>
         <!-- The main class to start by executing java -jar -->
         <start-class>com.baeldung.Application</start-class>
@@ -231,6 +230,7 @@
         <dynamodb.version>1.11.106</dynamodb.version>
         <dynamodblocal.version>1.11.86</dynamodblocal.version>
         <dynamodblocal.repository.url>https://s3-us-west-2.amazonaws.com/dynamodb-local/release</dynamodblocal.repository.url>
+        <maven-dependency-plugin.version>2.10</maven-dependency-plugin.version>
     </properties>
 
 </project>