UnprocessedCommitWalker: check for ZERO_ID before parsing

For a created branch commitSha1TransactionEnd is set to ZERO_ID, but
we check that first after we are trying to parse RevCommit from it.
Set transactionEnd to null if commitSha1TransactionEnd is equal to
ZERO_ID.

Solves: Jira GER-1611
Change-Id: I921752bd8140c0e8ff6e2a5829baac3e3554ccfc
2 files changed
tree: 5c1931bcb96facb18e0f2be9ce78f343297b8d17
  1. src/
  2. BUILD
  3. external_plugin_deps.bzl