ERRAI-618: Reduced code duplication of @Service and @Command features

Created a common interface for parsed services (ServiceParser -- both type or method
services).

Refactored CDIExtensionPoints and ServiceProcessor to use the
ServiceParser.

Fixed @Local feature in CDIExtensionPoints.

Fixed bean manager service lookup to use qualifiers (this was preventing
local type services from being found).
Added more tests for @Service and @Command annotations.

Copied tests between CDI and ErraiBus implementations.