JAVA-13823: Review module names (#12628)
* JAVA-13823: rename struts-2 to struts
* JAVA-13823: rename spring-cloud-bus submodules
* JAVA-13823: rename spring-cloud-config submodules
* JAVA-13823: rename spring-cloud-data-flow submodules
* JAVA-13823: rename spring-cloud-hystrix submodules
* JAVA-13823: rename spring-cloud-netflix-sidecar submodules
* JAVA-13823: rename spring-cloud-zookeeper submodules
* JAVA-13823: rename spring-cloud-zuul-fallback submodules
* JAVA-13823: rename spring-security-web-angular submodules
Co-authored-by: Dhawal Kapil <dhawalkapil@gmail.com>