Added parseint handle, redirect user back to landing page when he tries to access an issue that doesnt belong to him or when the user try to change the parameter for issue to anything other than integer.
Added parseint handle, redirect user back to landing page when he tries to access an issue that doesnt belong to him or when the user try to change the parameter for issue to anything other than integer.

SENG2050/it-services-portal,SENG2050/it-services-portal