Skipping flaky tests (celo-org#1848)

This PR comments/skips tests, builds and benchmarks that are known to be flaky.

Unit tests:
- TestAnnounceGossipQueryMsg celo-org#1849
- TestEthClient/TestCallContract celo-org#1850
- TestGethClient/TestAccessList celo-org#1851

Benchmarks:
- BenchmarkNet1000Txs celo-org#1852

Circleci builds:
- end-to-end-cip35-eth-compatibility-test celo-org#1853


While creating this PR, the istanbul-e2e-coverage failed once, then worked when it was re-run. I'm not skipping this one right now since I'd like to test it a bit more. Most likely it is because the parent commit has flaky tests, which are run for coverage report.

codecov/project is failing because we are removing a few tests. It is expected.

.circleci/config.yml

@@ -545,10 +545,11 @@ workflows:
           requires:
             - checkout-monorepo
             - build-geth
-      - end-to-end-cip35-eth-compatibility-test:
-          requires:
-            - checkout-monorepo
-            - build-geth
+# Flaky!
+#      - end-to-end-cip35-eth-compatibility-test:
+#          requires:
+#            - checkout-monorepo
+#            - build-geth
       - end-to-end-replica-test:
           requires:
             - checkout-monorepo

consensus/istanbul/backend/announce_test.go

@@ -16,6 +16,7 @@ import (
 // This test function will test the announce message generator and handler.
 // It will also test the gossip query generator and handler.
 func TestAnnounceGossipQueryMsg(t *testing.T) {
+	t.Skip() // Flaky
 	// Create three backends
 	numValidators := 3
 	genesisCfg, nodeKeys := getGenesisAndKeys(numValidators, true)

e2e_test/e2e_bench_test.go

@@ -33,6 +33,7 @@ func BenchmarkNet100EmptyBlocks(b *testing.B) {
 }
 
 func BenchmarkNet1000Txs(b *testing.B) {
+	b.Skip() // Flaky
 	// Seed the random number generator so that the generated numbers are
 	// different on each run.
 	rand.Seed(time.Now().UnixNano())

e2e_test/e2e_test.go

@@ -249,7 +249,7 @@ func TestRPCDynamicTxGasPriceWithState(t *testing.T) {
 	network, shutdown, err := test.NewNetwork(ac, gc, ec)
 	require.NoError(t, err)
 	defer shutdown()
-	ctx, cancel := context.WithTimeout(context.Background(), time.Second*30)
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second*90)
 	defer cancel()
 
 	accounts := test.Accounts(ac.DeveloperAccounts(), gc.ChainConfig())
@@ -306,7 +306,7 @@ func TestRPCDynamicTxGasPriceWithoutState(t *testing.T) {
 	network, shutdown, err := test.NewNetwork(ac, gc, ec)
 	require.NoError(t, err)
 	defer shutdown()
-	ctx, cancel := context.WithTimeout(context.Background(), time.Second*30)
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second*90)
 	defer cancel()
 
 	accounts := test.Accounts(ac.DeveloperAccounts(), gc.ChainConfig())

ethclient/ethclient_test.go

@@ -260,9 +260,10 @@ func TestEthClient(t *testing.T) {
 		"TestStatusFunctions": {
 			func(t *testing.T) { testStatusFunctions(t, client) },
 		},
-		"TestCallContract": {
-			func(t *testing.T) { testCallContract(t, client) },
-		},
+		// Flaky
+		// "TestCallContract": {
+		// 	func(t *testing.T) { testCallContract(t, client) },
+		// },
 		"TestAtFunctions": {
 			func(t *testing.T) { testAtFunctions(t, client) },
 		},
@@ -476,6 +477,7 @@ func testStatusFunctions(t *testing.T, client *rpc.Client) {
 	}
 }
 
+// nolint:deadcode
 func testCallContract(t *testing.T, client *rpc.Client) {
 	ec := NewClient(client)
 

ethclient/gethclient/gethclient_test.go

@@ -99,9 +99,10 @@ func TestGethClient(t *testing.T) {
 	tests := map[string]struct {
 		test func(t *testing.T)
 	}{
-		"TestAccessList": {
-			func(t *testing.T) { testAccessList(t, client) },
-		},
+		// Flaky
+		// "TestAccessList": {
+		// 	func(t *testing.T) { testAccessList(t, client) },
+		// },
 		"TestGetProof": {
 			func(t *testing.T) { testGetProof(t, client) },
 		},
@@ -130,6 +131,7 @@ func TestGethClient(t *testing.T) {
 	}
 }
 
+// nolint:deadcode
 func testAccessList(t *testing.T, client *rpc.Client) {
 	ec := New(client)
 	// Test transfer