-Added placeholder {start-class} tag in parent-boot-2's spring-boot-maven-plugin so that any child that has a {start-class} automatically is benefited from this plugin and wil help that child class to run
-Fix startup issues of few spring boot 2 projects
* BAEL-1979 Added examples for SnakeYAML Library
* BAEL-1979 Moved the snakeyaml related code to libraries module
* BAEL-1979 Removed the System.out.println() statements and converted the assertTrue to assertEquals wherever possible.
* BAEL-1979 Removed println statements, small formatting fix in pom.xml
* BAEL-1466 Added a new module for apache-geode
* BAEL-1466 Updated the Integration Tests.
* BAEL-1466 Updated the Integration Tests.
* BAEL-1466 Updated the Integration Tests.
* BAEL-1466 Removed the Unnecessary code.
* BAEL-2262 Added code for demonstration of HTTPS enabled Spring Boot Application
* Added parent module on poms that have no parent defined
* Removed dependency reduced pom from undertow module
* [BAEL-5249] - 21.02 - pom cleanup - formatted pom.xml
* Added parent module on poms that have no parent defined
* Removed dependency reduced pom from undertow module
* Defined the integration profile in the parent
