Create a separate Domain Table tied 1:N to an account

[maria-farooq]

https://telestax.atlassian.net/browse/RESTCOMM-856

• add unit test for default account on new account creation
• add table schema in init of hsql and mysql
• add default insert in init of hsql and mysql (just like we add default admin account)
• update account table (add new column for organization_sid with default) in init and also update default entry
• update all test hsql scripts in public/private repos to accommodate new schema for both tables.
• add db upgrade scripts for new table organization and new column in account and default value. make sure it populates existing accountsrows
• add mybatis xml query mapping for organization
• Default organization’s domain_name in organization table will be picked from RC hostname on bootstrap.  #2085