Fix more sonar issues in Integrity Audit & Monitor

Fix more sonar issues in Integrity Audit & Monitor

Removed duplicate code in DbDao by refactoring common code
into a new updateIae() method.
Removed duplicate code in IntegrityMonitor by refactoring common code
into a new withinTransaction() method.
Removed duplicate code in StateManagementEntity, StateElement by
replacing with lombok Getter & Setter annotations.
Removed duplicate code in StateManagement by refactoring common code
into new setState() and getState() methods.  Also removed
logger.isDebugEnabled() tests.
Added coverage for StateChangeNotifier.

Change-Id: I2e29b836dafc5de569a2267206a6a34105e44021
Issue-ID: POLICY-1791
Signed-off-by: Jim Hahn <jrh3@att.com>