Updated manifest with nats-release 21

[#144721041] Add ops file enabling CC to use a CDN in front of the dr…

…oplets and resource_pool buckets

Updated manifest with diego-release 1.20.0

No manifest release or stemcell version updates

Add ops-files for enabling rep to prefer declarative healthchecks

[finishes #146902681]

Signed-off-by: Danny Cao <dcao@us.ibm.com>

Updated manifest with loggregator-release

Updated manifest with cf-smoke-tests-release

Merge branch 'diego-1496675408-local-tcp-emitter' into develop

Updated manifest with uaa-release

only remove global tcp emitter in linux opsfile

* we don't expect users to deploy windows cells without linux cells
* this change allows users to apply both local tcp emitter ops files
  with no error

[#142583351]

Signed-off-by: James Myers <jfmyers9@gmail.com>