Updates nsync to use internal api password

... and cleanup unreferenced properties in file_server

[#80217622]

Signed-off-by: Amit Gupta <agupta@pivotal.io>
bump runtime-schema stager

[delivers #80217622]

Submodule src/github.com/cloudfoundry-incubator/runtime-schema c180f31..7d18f61:
  > Add FailedToResolveTask funciton to task
Submodule src/github.com/cloudfoundry-incubator/stager 2f0d358..43f0d5c:
  > Retry when resolving staging task fails

Signed-off-by: Amit Gupta <agupta@pivotal.io>