Fix documentation-path in package_builder (#3081)
Fix documentation-path in package_builder (#3081)

When building stubs, the `package.json` file included URLs like `https://docs.mesosphere.com/services/kafka/v2.6.0-5.1.2/` which would lead to `Page not found`s. Removing the `v` fixes the links to point to the right service pages.
mesosphere/dcos-commons,mesosphere/dcos-commons,mesosphere/dcos-commons,mesosphere/dcos-commons,mesosphere/dcos-commons