Used Group Validation in replace of using a different Form model for
validating same entity with different field groups.
Enhancement in Validators of UserAccount and CHemistry CHemical Entities

Autocomplete Feature Front end and Backend, implemented in UserAccount
username for Chemistry Chemical Search Table page

Enhancement in DAO, Services and Model Heirarchy Abstraction, lesser
code in subclasses, some fields are extracted to ConcreteModel, a
subclass of BaseModel that are not intended as Reference/Lookup table

Fix issues in SearchCriteria building of Criteria and corresponding
toString method for debugging purposes

Fix RestrictionFactory