Fix frontend errors in DisabledCertificateCheck tests.

Author: Max Schaefer

ql/test/query-tests/Security/CWE-295/DisabledCertificateCheck/tst.go

@@ -1,6 +1,10 @@
 package main
 
-import "testing"
+import (
+	"crypto/tls"
+	"net/http"
+	"testing"
+)
 
 func TestSomethingExciting(t *testing.T) {
 	transport := &http.Transport{