Ensure testing credentials are labeled as such

test/integration/master/synthetic_master_test.go

@@ -54,6 +54,7 @@ import (
 )
 
 const (
+	// Fake values for testing.
 	AliceToken string = "abc123" // username: alice.  Present in token file.
 	BobToken   string = "xyz987" // username: bob.  Present in token file.
 )

test/integration/master/transformation_testcase.go

@@ -46,7 +46,7 @@ import (
 
 const (
 	secretKey                = "api_key"
-	secretVal                = "086a7ffc-0225-11e8-ba89-0ed5f89f718b"
+	secretVal                = "086a7ffc-0225-11e8-ba89-0ed5f89f718b" // Fake value for testing.
 	encryptionConfigFileName = "encryption.conf"
 	testNamespace            = "secret-encryption-test"
 	testSecret               = "test-secret"