Add Code-Review submit requirement

Change-Id: I58cd31140959ff4bf7e14ce9518357c503f7f612
diff --git a/project.config b/project.config
index cf584d5..9c9cb22 100644
--- a/project.config
+++ b/project.config
@@ -148,3 +148,7 @@
 	description = A change must get two Trust+1 or Code-Review+2 from two different approvers.
 	submittableIf = distinctvoters:\"[Code-Review,Trust],value=MAX,count>1\"
 	canOverrideInChildProjects = true
+[submit-requirement "Code-Review"]
+	description = At least one maximum vote for label 'Code-Review' is required. Self review is not allowed.
+	submittableIf = label:Code-Review=MAX,user=non_uploader AND -label:Code-Review=MIN
+	canOverrideInChildProjects = true