[calico-containers] Align to upstream

s/BUILD_CONTAINER_NAME/PYTHON_BUILD_CONTAINER_NAME

[1]. https://github.com/projectcalico/calico-containers/commit/7a4afcbc7ae1d7d0dd02129cbe079346af9681c3

Change-Id: I42bea7d6c7ac3d32141ba8d63c85cb46a43af219
1 file changed
tree: 36ff57b186077c213ad165a5521ae0eab390c3e5
  1. src/
  2. vars/
  3. .gitreview