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)

spring-5-mvc/pom.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <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-5-mvc</artifactId>
@@ -111,7 +111,7 @@
                     <compilerPlugins>
                         <plugin>spring</plugin>
                     </compilerPlugins>
-                    <jvmTarget>1.8</jvmTarget>
+                    <jvmTarget>${java.version}</jvmTarget>
                 </configuration>
                 <executions>
                     <execution>
@@ -176,10 +176,6 @@
 
     <properties>
         <jayway-rest-assured.version>2.9.0</jayway-rest-assured.version>
-        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-        <java.version>1.8</java.version>
-        <spring.version>5.0.2.RELEASE</spring.version>
         <kotlin.version>1.1.2</kotlin.version>
     </properties>