CONN-1390:Updated domain related files for not to allow adding duplicate domains
CONN-1390: modified configdb sql script to add unique constraint to domains table.
license change, resolved merge conflict
CONN-1390: Updated nhincdb.sql, nhincdb_oracle.sql to add unique constraint for domain table
CONN-1390: As per pr comment, renamed CreateDomainException.java to DomainException.java and updated log message
Merge pull request #931 from sailajaa/CONN-1390

Conn 1390:Fix for not allowing to add duplicate domain