Update Owner.groovy

Added constraints for zipCode, primaryPhone, and secondaryPhone.
Update messages.properties

Added custom error messages for zipcode, primaryPhone, secondaryPhone, accountNumber, and accountBalance.
Update _form.gsp

Added label for phone format example after primaryPhone textbox.
Merge pull request #1 from rdelmundo/patch-2

Update messages.properties
Merge pull request #2 from rdelmundo/patch-3

Update _form.gsp
Merge pull request #3 from rdelmundo/patch-1

Update Owner.groovy
Merge branch 'model'