support for registry batch dependency update

[rlindner81]

PATCH /saas-manager/v1/application/subscriptions/batch
...

We currently do this concurrency in mtx-tool, but with the new batch API it could be done server-side.

Link:
https://saas-manager.cfapps.stagingaws.hanavlab.ondemand.com/api?urls.primaryName=Saas-Manager-Service-Api$cis-system&scope=cis-system#/a_ApplicationController%20API/batchUpdateApplicationAndTenantSubscriptionAsync_1

Also for subscription-manager

PATCH /subscription-manager/v1/subscriptions/batch
...

https://int.api.hana.ondemand.com/api/APISubscriptionManagerService/path/batchUpdateApplicationAndTenantSubscriptionAsync