TRUNK-4315: Validate on client side (javascript)

Decided to validate on client side because on server side calling provider.getName()
when person is set will return person's full name and so it is not possible to tell if
this was set on the client side.

TRUNK-4315 - Removed commented out code

TRUNK-4315 - Ammended method for checking whether person or provider name is provided

TRUNK-4315: Added a span tag to hold error message from both client and server
Merge pull request #961 from geoff-wasilwa/TRUNK-4315

TRUNK-4315: Validate on client side (javascript)