Java SDK expects versions to be provided for retrieval

[zhilingc]

Expected Behavior

Retrieval of features via the Java SDK should not require reference to the feature version

Current Behavior

Validation error is thrown if feature provided has no version:

  message: "Feature id 'project/feature' has invalid format. Expected format: <project>/<feature-name>:<feature-version>."  

Steps to reproduce

Request for feature without version

Specifications

• Version: 0.4.4

Possible Solution

Let feature versions be optional. Relevant code is here.