The problem with the flatten plugin is that it unconditionally
nukes the dependency management section, which we very much need
in our "dependencies" modules.
The key is to make the "dependencies" pom independent of the main
reactor (pattern copied form Spring Cloud). Then you can run
flatten in the main reactor build and not in the dependencies,
which then retain there useful properties and dependency
management.
This commit does the following:
* Adds a `spring-grpc-spring-boot-starter` module
* Adjusts the scope of the dependencies in the`spring-grpc-spring-boot-autoconfigure`
module to optional
This commit does the following:
- Update various dependencies to latest patch versions
- Remove unused dependencies
- Remove unused version properties
- Remove Spring Boot references in all modules except autoconfigure
and samples
