TargetAllocator replace image with repository and tag

[nheetesonne]

In the TargetAllocator the image is currently specified as the repository and image in one line.
"Normally" a repository is specified and the tag of the image is specified.
This makes is possible to use renovatebot (or its alternatives) and seems to be the standard.
Using the current solution with an image that specifies both the reposittory and image and version in one line makes it differ from "the standard" (or doesn't it)

Shouldn't this be adjusted.