oeqa/utils/gitarchive: Handle case where parent is only on origin

The parent code currently assumed that any parent branch is locally
checked out which may not be the case.

Use the local branch by default but fall back to the origin. This
also means removing the later saftey check as the branch may not exist
locally.

This fixes the autobuilder resulttool test pushing code.

(From OE-Core rev: 36624a17d382d84647c5811134fe76251fd64dc3)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/utils/gitarchive.py

@@ -80,6 +80,8 @@ def git_commit_data(repo, data_dir, branch, message, exclude, notes, log):
 
         # Create new commit object from the tree
         parent = repo.rev_parse(branch)
+        if not parent:
+            parent = repo.rev_parse("origin/" + branch)
         git_cmd = ['commit-tree', tree, '-m', message]
         if parent:
             git_cmd += ['-p', parent]
@@ -93,8 +95,6 @@ def git_commit_data(repo, data_dir, branch, message, exclude, notes, log):
 
         # Update branch head
         git_cmd = ['update-ref', 'refs/heads/' + branch, commit]
-        if parent:
-            git_cmd.append(parent)
         repo.run_cmd(git_cmd)
 
         # Update current HEAD, if we're on branch 'branch'