Better integration update

(Migrated from https://github.com/syndesisio/syndesis/issues/6313)

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
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Description

Updating an integration to newer version first terminates the integration then builds new one and deploys it instead of first building the new one and then rolling out latest already prepared deployment.
This leads to integration service being unavailable for quite some time as it can take few minutes before new integration pod is ready.