GPL-711 As a developer when the destination plate has been created we need to create an event in the Events warehouse

[stevieing]

User story
When the destination plate has been created, create an event in MLWH events to say which samples and robot it was created on.

Who are the primary contacts for this story
Beckman
PSD

Acceptance criteria
To be considered successful the solution must allow:

• On creating the plate, create a broadcast event in SS database to trigger generate a new event in MLWH events
• Check that the events have been generated with the right subjects associated as described in document (Cherrypicked Events)

Dependencies
This story is blocked by the following dependencies:
sanger/crawler#156
sanger/unified_warehouse#145

Additional context
See https://ssg-confluence.internal.sanger.ac.uk/display/PSDPUB/Cherrypicking+Events
We need to find out whether the plate still needs to be registered in Labwhere for reporting purposes.
SS issue: sanger/sequencescape#2959

[KatyTaylor]

Clarifications from Confluence page -
"This story is about registering the source plate as being on site. It is not related to picked samples. This is equivalent to the current created event for each plate in Labwhere."

"So if this is the source plate that's just been picked I think it's about to get thrown in the bin. They pick all the volume from the wells, so not reusable. It's still useful to log it on site, but location might be 'bin'.

Q. for Scott/Lesley"

[emrojo]

Pull request for SS side: sanger/sequencescape#2959