Fix sonar generic Exceptions in policy/common

Fix sonar generic Exceptions in policy/common

IntegrityMonitor.java:
Renamed variables, Ex: dep_groups => depGroups.
Renamed enum constants, Ex: pdp_xacml => PDP_XACML.
Merged "if" tests.
Cast values to "long" before multiplying.
Re-throw interrupt().
Write exception via logger instead of e.printStackTrace().
Moved constructor to top of the file.
Removed most logger.isDebugEnabled() checks.
Returned generic List instead of ArrayList.
Used entrySet() instead of keySet().
Removed useless parentheses.
Removed superfluous exceptions from "throws" declaration.

DbAudit.java:
Modified DbAudit to throw DbAuditException.
Replaced references to HashSet and HashMap with generic Set and Map.
Modified DbAudit to iterate over entrySet() instead of keySet().

ComponentAdminException:
Created ComponentAdminException class.
Modified ComponentAdmin methods to throw new exception class.
Extracted "stateManager" String constant.
Eliminated logger.isDebugEnabled() calls.
Updated the license data.

Eliminated double-checked locking problem from PropertyUtil:
Modified code to use Initialization On Demand Holder idiom.

Change-Id: Ic01288542041da26df483ce85ecaf292ac138f85
Issue-ID: POLICY-246
Signed-off-by: Jim Hahn <jrh3@att.com>