validate_test.py - Ambiguous import: "patch" from package "mock"

[SinaChavoshi]

src/python/tensorflow_cloud/core/tests/unit/validate_test.py, no direct deps found for imports:
line 20: from mock import patch: Ambiguous import: "patch" from package "mock": cannot determine whether "patch" is an attribute on the package, or a module not provided by a direct dependency.