re-order vm-strategy use-cases
re-order vm-strategy use-cases

"Reduce Deployment Time" should come first, so that it is easier for the
reader to understand the "H/A Tradeoff" use case

Signed-off-by: Toby Lorne <527052641d65eef236eeef9545b2acac74c35d57@digital.cabinet-office.gov.uk>

Co-authored-by: Jonathan Glassman <0d5bcba9bd20fab6187884e072e76c9cbbe9d1fe@digital.cabinet-office.gov.uk>
Co-authored-by: Toby Lorne <527052641d65eef236eeef9545b2acac74c35d57@digital.cabinet-office.gov.uk>

cloudfoundry/docs-bosh