Fix "Run Portable_Python PreCommit" for gradle 5

 16:09:03 FAILURE: Build failed with an exception.
 16:09:03 
 16:09:03 * What went wrong:
 16:09:03 Could not determine the dependencies of task ':beam-runners-flink_2.11-job-server-container:copyDockerfileDependencies'.
 16:09:03 > Could not resolve all dependencies for configuration ':beam-runners-flink_2.11-job-server-container:dockerDependency'.
 16:09:03 > No value has been specified for this provider.