[nobug] Don't fetch the full parent commits for the JSON response

As the SHA value of the commits is the only information that's needed
for the JSON, simply retrieve it via the commit object instead of
fetching full commit objects for the parents.

Signed-off-by: Remy Suen <[email protected]>

Author: rcjsuen

modules/orionode/lib/git/commit.js

@@ -587,11 +587,8 @@ function countCommit(revWalk){
 }
 
 function getCommitParents(repo, commit, fileDir) {
-	return commit.getParents()
-	.then(function(parents) {
-		return parents.map(function(parent) {
-			return createParentJSON(parent.sha(), fileDir);
-		});
+	return commit.parents().map(function(parent) {
+		return createParentJSON(parent.toString(), fileDir);
 	});
 }