Fix sonar code issues for api-state-management

Renamed constants, adding "DO_" prefix or "_STATE" suffix.
Removed spurious exceptions from "throws" clauses.

Change-Id: I0abd74d736009480614f0653fe5aaf1ddbe77b08
Issue-ID: POLICY-468
Signed-off-by: Jim Hahn <jrh3@att.com>
2 files changed