added bolean request_fulfilled field to sponsor model

OSRA-88 #code-review #comment explicitly return true on before_create method
to ensure record saved
added request_fulfilled field into the views

-shown in index, show and edit
-not shown in create
-ensures field is true or false
-set field before create

OSRA-87 OSRA89 OSRA-90 #code-review
added constraints to request_fulfilled field

https://osraav.atlassian.net/browse/OSRA-87
OSRA-87 OSRA-88 #code-review
- added not null constraint because this field must be true or false
- added index as this field will be searched on as part of the story
tidied white space issues to match coding style for project
moved reload call into expect statement
Merge pull request #67 from PurityControl/sponsor_request_fulfilled

OSRA-87 OSRA-88 OSRA89 OSRA-90 #resolved