Extend presubmit to covert test and request (#1846)

Fix the casing *and* fix use of context as we were still referencing
the non-std lib context - no wondering how this could have worked...

test/cache_test.go

@@ -14,7 +14,7 @@ func TestLookupCache(t *testing.T) {
 	// Start auth. CoreDNS holding the auth zone.
 	name, rm, err := test.TempFile(".", exampleOrg)
 	if err != nil {
-		t.Fatalf("failed to create zone: %s", err)
+		t.Fatalf("Failed to create zone: %s", err)
 	}
 	defer rm()