[QA] Fix duplicate year in namespace name

Signed-off-by: Rémy Coutable <remy@rymai.me>

qa/qa/runtime/namespace.rb

@@ -8,7 +8,7 @@ module QA
       end
 
       def name
-        "qa-test-#{time.strftime('%Y-%m-%d-%Y-%H-%M-%S')}"
+        "qa-test-#{time.strftime('%Y-%m-%d-%H-%M-%S')}"
       end
 
       def path