Merge Spring security with dependencies

[unix1982]

Applied the change proposed on #8199

[eleftherias]

Thanks for the PR @unix1982!

I think we can go one step further, by merging the dependency table into each module section.
The structure would then look like this:

[[spring-security-core]]
== Core -- `spring-security-core.jar`
This module contains core ...

|===
| Dependency | Version | Description

| ehcache
| 1.6.2
| Required if the Ehcache-based user cache implementation is used (optional).
...

[[spring-security-remoting]]
== Remoting -- `spring-security-remoting.jar`

Then there is just the question of where the intro text "This section provides a reference of the modules in Spring Security and the additional dependencies that they require in order to function in a running application. We don't include ..." goes.

I think that could be moved under = Project Modules and Dependencies.
Then, we could get rid of dependencies.adoc completely.

[unix1982]

I will do it! Thanks

[eleftherias]

Thanks for the PR @unix1982!
This is now merged into master.