Allow for a 'unsatisfactory' option on PMVs

We would like the ability for contractors to upload 'unsatisfactory' certificates for PMV's, this would ensure that contractors can be paid for their initial visits. This would allow for reports to be run of all PMV types and provide accurate reporting, e.g. fire alarm might require remedials following the pmv date which would then be a planned quoted job - this could take a number of weeks to be completed. Contractor can upload an unsatisfactory certificate, be paid, but we would be able to run a report to show all pass, all unsatisfactory rather than having an unsatisfactory certificate being on the system with a 'pass' showing on AM.