DATACOUCH-653 - Update example versions in documentation.

[mikereiche]

The format has changed as well. The release versions no longer have
the .RELEASE suffix - they are just the version number (i.e. 4.1.1)
And the snapshot versions have the suffix -SNAPSHOT (i.e. 4.2.0-SNAPSHOT)
instead of 4.1.0.BUILD-SNAPSHOT

• You have read the Spring Data contribution guidelines.
• There is a ticket in the bug tracker for the project in our JIRA.
• You use the code formatters provided here and have them applied to your changes. Don’t submit any formatting related changes.
• You submit test cases (unit or integration tests) that back your changes.
• You added yourself as author in the headers of the classes you touched. Amend the date range in the Apache license header if needed. For new types, add the license header (copy from another file and set the current year only).

[daschl]

@mp911de do you guys have a strategy to automatically fill those versions in, or is it all manual work still?