Use artifacts to import dependencyManagement

For mdsal, yangtools and config we can use the artifacts pom to import
all artifacts in that group. This simplifies version management, so
let's use it.

Change-Id: Ic5a784314f79d774edfd05d48cb09836fba4b085
Signed-off-by: Robert Varga <rovarga@cisco.com>
7 files changed