Java 11493 (#12349)

* moved spring-cloud-bus (submodule) to spring-cloud-modules (parent)

* moved spring-cloud-cli (submodule) to spring-cloud-modules (parent)

* moved spring-cloud-data-flow (submodule) to spring-cloud-modules (parent)

* moved spring-sleuth (submodule) to spring-cloud-modules (parent)

* Deleted submodules that we moved to  spring-cloud-modules

* deleted old modules from parent pom

Co-authored-by: panagiotiskakos <panagiotis.kakos@libra-is.com>

pom.xml

@@ -610,9 +610,7 @@
                 <module>spring-caching-2</module>
 
                 <module>spring-cloud-modules</module>
-                <module>spring-cloud-bus</module>
                 <!-- <module>spring-cloud-cli</module> --> <!-- Not a maven project -->
-                <module>spring-cloud-data-flow</module>
 
                 <module>spring-core</module>
                 <module>spring-core-2</module>
@@ -654,7 +652,6 @@
                 <module>spring-scheduling</module>
                 <module>spring-security-modules</module>
                 <module>spring-shell</module>
-                <module>spring-sleuth</module>
                 <module>spring-soap</module>
                 <module>spring-spel</module>
                 <module>spring-state-machine</module>