PDE artifacts are published on Maven Central with org.eclipse.pde
groupId.
To facilitate further work which could allow deploying to p2 and Maven
as
part of the same build, let's use the target/expected buildId directly
so
we don't have to generate a new one later.
artifactId is already 1-1 mapping.
Only versions would then be different between Maven (-SNAPSHOT) and p2
metadata
(.yyyyMMddhhmm)

Change-Id: Iefbbac454d52f61a6805c46449ff75ffa2f63535
Reviewed-on: https://git.eclipse.org/r/c/pde/eclipse.pde.ui/+/190228
Tested-by: PDE Bot <pde-bot@eclipse.org>
Reviewed-by: Sravan Kumar Lakkimsetti <sravankumarl@in.ibm.com>
Reviewed-by: Mickael Istria <mistria@redhat.com>