Bael 6729 (#4389)

* Added parent module on poms that have no parent defined

* Removed dependency reduced pom from undertow module

* Added README

* [BAEL-6729] - Spring modules needs a spring parent

* [BAEL-6729] - Spring modules needs a spring parent

spring-5-security/pom.xml

@@ -9,10 +9,10 @@
     <description>spring 5 security sample project</description>
 
     <parent>
-        <groupId>org.springframework.boot</groupId>
-        <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.0.0.RELEASE</version>
-        <relativePath/> <!-- lookup parent from repository -->
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-boot-2</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../parent-boot-2</relativePath>
     </parent>
 
     <dependencies>