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)

vertx/pom.xml

@@ -1,36 +1,35 @@
 <?xml version="1.0"?>
-<project
-        xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
-        xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
     <modelVersion>4.0.0</modelVersion>
-    <parent>
-        <groupId>com.baeldung</groupId>
-        <artifactId>parent-modules</artifactId>
-        <version>1.0.0-SNAPSHOT</version>
-    </parent>
+
     <groupId>com.baeldung</groupId>
     <artifactId>vertx</artifactId>
     <version>1.0-SNAPSHOT</version>
     <name>vertx</name>
     <url>http://maven.apache.org</url>
-    <dependencies>
 
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
+    <dependencies>
         <dependency>
             <groupId>io.vertx</groupId>
             <artifactId>vertx-core</artifactId>
-            <version>3.0.0</version>
+            <version>${vertx.version}</version>
         </dependency>
-
         <dependency>
             <groupId>io.vertx</groupId>
             <artifactId>vertx-web</artifactId>
-            <version>3.0.0</version>
+            <version>${vertx.version}</version>
         </dependency>
-
         <dependency>
             <groupId>io.vertx</groupId>
             <artifactId>vertx-unit</artifactId>
-            <version>3.0.0</version>
+            <version>${vertx.version}</version>
             <scope>test</scope>
         </dependency>
     </dependencies>
@@ -40,7 +39,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-shade-plugin</artifactId>
-                <version>2.3</version>
+                <version>${maven-shade-plugin.version}</version>
                 <executions>
                     <execution>
                         <phase>package</phase>
@@ -49,15 +48,14 @@
                         </goals>
                         <configuration>
                             <transformers>
-                                <transformer
-                                        implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
+                                <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                                     <manifestEntries>
                                         <Main-Class>io.vertx.core.Starter</Main-Class>
                                         <Main-Verticle>com.baeldung.SimpleServerVerticle</Main-Verticle>
                                     </manifestEntries>
                                 </transformer>
                             </transformers>
-                            <artifactSet/>
+                            <artifactSet />
                             <outputFile>${project.build.directory}/${project.artifactId}-${project.version}-app.jar</outputFile>
                         </configuration>
                     </execution>
@@ -67,10 +65,9 @@
     </build>
 
     <properties>
-
-        <!-- testing -->
+        <vertx.version>3.0.0</vertx.version>
         <testng.version>6.10</testng.version>
-
+        <maven-shade-plugin.version>2.3</maven-shade-plugin.version>
     </properties>
 
 </project>