Amend: Refactored Executor static modes specific methods into a EDEXModesUtil class in
the edex.core.modes package. Move EdexMode, DefaultEdexMode, and EdexModesContainer
to the same package.
Change-Id: Ib6af9557ca8d875c5eff162b46bf56e2c041e0fb
Former-commit-id: 76a844ed3158bcc80dc0d4b751cad83d39fcbbc4