Label flaky deployment test as per #15369.

hack/jenkins/e2e.sh

@@ -133,6 +133,7 @@ GCE_FLAKY_TESTS=(
     "should\sbe\sable\sto\screate\sa\sfunctioning\sexternal\sload\sbalancer" # same as above, also catches "...with user-provided balancer ip"
     "pod\sw/two\sRW\sPDs\sboth\smounted\sto\sone\scontainer,\swrite\sto\sPD" # file: pd.go, issue: #15382 
     "pod\sw/\sa\sreadonly\sPD\son\stwo\shosts,\sthen\sremove\sboth" # file: pd.go, issue: #15382
+    "deployment.*\sin\sthe\sright\sorder" # issue: #15369
     )
 
 # The following tests are known to be slow running (> 2 min), and are