Fill javadoc for class org.openmrs.activelist.ActiveListType - TRUNK-3176

TRUNK-3176 fill javadoc fro the class ActiveListType. I did some changes as ur comments.

Removed unnecessary javadocs that are defined on the superclass or getters/setters  - TRUNK-3176
Default values not recognized In the Locations --> "Manage Layout" -
TRUNK-3564
Manage preferred status for PersonName, PersonAddress and
PatientIdentifier in the API - TRUNK-2200
Follow up to set the preferred or fully specified name for a concept
list item - TRUK-3232
Manage preferred status for PersonName, PersonAddress and
PatientIdentifier in the API - TRUNK-2200

Taken care of patient identifier and also updated savePatient - TRUNK-2200
Automated Error Report: NumberFormatException on AddPersonController -
TRUNK-2751

Automated Error Report: NumberFormatException on AddPersonController - TRUNK-2752

Applying auto format - TRUNK-2751

Added a unit test to ensure that things work fine for a valid birthdate - TRUNK-2751