Maven Central Mapping heuristics does not respect useMavenCentral=false

[minhphamswe]

Scenario: useMavenCentral(false) is set in P2Model

Expected outcomes:

• When running equoList --installed, features and plugins should not resolve to either maven central or maven central?
• p2deps should not attempt to pull features and plugins from the list of repositories defined in the project. They should pull from the p2repo only.

Actual outcomes:

• When running equoList --installed, some features and plugins (for example, org.eclipse.osgi) still show maven central?
• Plugins are pulled from the project's repositories list (as, for example, org.eclipse.platform:org.eclipse.osgi:<version>), not from the defined p2repo, and the build will fail if the plugin isn't found in the repositories.