[Task]: Kettle Import: move connections to a case sensitive naming scheme

[hansva]

What needs to happen?

Migration: https://issues.apache.org/jira/browse/HOP-3431

It would be great if we could detect that in Kettle it was possible to have transformations and jobs with connection names that don't match the case of the shared connection.

For example, one step could use "Database", another "database" and yet another "DATABASE" and it would work fine.

In Hop this is no longer the case. 
It would be cool if we could align all usage to a single variant and replace the incorrect occurrences in the XML.

Issue Priority

Priority: 3

Issue Component

Component: Import

[mattcasters]

This needs a solid renaming strategies: Rename all to the same lowercase value, so all to "database", also in the usage.