With OSGi DS we can have very explicit control over component
activations. Use component factory pattern, which provides async
publish of DOMStore into service registry. This allows us to
make startup asynchronous).
JIRA: CONTROLLER-1882
Change-Id: Id09f956ec9088388ec5cbd3162d128310baddf51 Signed-off-by: Robert Varga <robert.varga@pantheon.tech>