[Conditional flow] Collection input data shape handling

(Migrated from https://github.com/syndesisio/syndesis/issues/6159)

Author: @mcada
Assignees: unassigned

This is a...

[pre][code]
[x] Feature request
[ ] Regression (a behavior that used to work and stopped working in a new release)
[ ] Bug report [!-- Please search GitHub for a similar issue or PR before submitting --]
[ ] Documentation issue or request
[/code][/pre]

Description

I can not add conditional flow if previous input data shape is a collection.

To create integration

database -> split -> conditional flow

I have to first create

database -> log

then add split, delete log and add conditional flow. We could automatically add split step in case of adding conditional flow after collection output data shape.

One of conditional flow feature requirements was that we can add this step anywhere. This is not true atm - we can not add it after a collection unless we first add split step.