Specify ruby version as 2.1.7 for bosh-load-tests
Specify ruby version as 2.1.7 for bosh-load-tests

Signed-off-by: Gary Liu <e2834181ebd96d7544bc16fb46591d272d6ed785@pivotal.io>

barthy1/bosh,barthy1/bosh,barthy1/bosh,barthy1/bosh