Bump aws cpi version back to 50
Bump aws cpi version back to 50

- Validating that bootload-mega-ci leaves behind a modified,
  uncommitted bosh-state.json

[#108387328]

Signed-off-by: Kevin Kelani <efa91e710b9557b327e9f2a4990d2dbb61dce345@pivotal.io>

cloudfoundry/mega-ci,cloudfoundry/mega-ci