Multi-package doesn't support source: .

[samuel-williams-da]

Both multi-package build and multi-ide struggle with packages that define source: . in daml.yaml
For build, we get an error when it tried to initialize the package database
For multi-ide, goto definition on source packages defined like this fails

In general for multi-package, we should recommend users have a separate folder for daml files - i.e. source: daml
For 2.10, we will fix this behaviour.