Upgrade fog gem to v1.11.1
[#48749497] Set CANDIDATE_BUILD_NUMBER for later builds in the chain and update the BOSH version number before building stemcells
[finishes #48749497] - ci stemcell tasks to support build pipeline
Merge pull request #157 from cloudfoundry/bump_fog_gem

Upgrade fog gem to v1.11.1
use new pipeline stemcell builds for jenkins
switch ci publish gems to use the gem from the pipeline build bucket
add parallel_tests gem to ci_build_with_candidate_gems
Clean director snapshoting and added snapshot deployment

[#46837175]
Added Director schedule with snapshot deployments task

- Uses rufus scheduler for defining scheduled tasks
- Can be set in the director.yml as scheduled_jobs array

[#46837175]
Fix user logging for create stemcell and delete deployment tasks
Ensure scheduler properly handles no scheduled jobs

[#46837175]
Added integration test for director scheduler

[#46837175]
use bundler for pipeline gems
Turn on scheduled snapshots for bootstrapped microbosh and bosh

[Finishes #46837175]