Use only "Code-Review" votes.

* An owner can vote on multiple labels.
  Only the "Code-Review" vote should be used
  for owner-approval check.

Change-Id: I52d6d1a7743f7ec42f244ce7512cbbf80b763fa8

src/main/java/com/googlesource/gerrit/plugins/findowners/Checker.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/findowners/Checker.java b/src/main/java/com/googlesource/gerrit/plugins/findowners/Checker.java
index 54861a1..30d1a4c 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/findowners/Checker.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/findowners/Checker.java
@@ -55,7 +55,8 @@
       throws OrmException {
     Map<String, Integer> map = new HashMap<>();
     for (PatchSetApproval p : changeData.currentApprovals()) {
-      if (p.getValue() != 0) {
+      // Only collect non-zero Code-Review votes.
+      if (p.getValue() != 0 && p.getLabel().equals("Code-Review")) {
         // Reviewers may have no preferred email, skip them if the preferred email is not set.
         Optional<String> preferredEmail =
             accountCache.get(p.getAccountId()).map(a -> a.getAccount().getPreferredEmail());