Add support for sharding among multiple brokers supporting the same service offering #208
Description
Expected behavior
As an osb-cmdb operator
In order to scale offering such as mysql "schema as a service" on a shared cluster
I need osb-cmdb to shard service instance requests among multiple service brokers without user-facing impacts
https://github.com/cloudfoundry-community/cf-subway
Observed behavior
Known limitation #8
Possible fixes
- during v2/catalog
- only pick a single service offering name offered from multiple brokers
- during create service instance
- iterate over available brokers
- attempt to create service instance
- retry to next broker if failure caused by quota exceeded (and possibly other white listed errors)
- otherwise fail.
Affected release
Reproduced on version x.y
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