When constructing the target state after a reported change from livepush, the
handler function would not pass all build tasks to the function that
constructs the target state, causing a TypeError when trying to obtain
the target image name for each service. This updates the handler to pass
all build tasks, ensuring the information is available to construct the
target state.
Relates-to: #2724
Change-type: patch
8d6a621bfb