Refactor locks to be more fine-grained
Refactor locks to be more fine-grained

Replace the single lock around standalone bits-service deployments with individual locks around each deployment with the {local,s3,webdav} backend.

Signed-off-by: Peter Goetz <09cc375d163687e11b72d8636c5f6c2d071b96c4@de.ibm.com>

cloudfoundry-incubator/bits-service-ci,cloudfoundry-incubator/bits-service-ci,cloudfoundry-incubator/bits-service-ci