Augment references of pkcs1 with oaep

Rightly the system in use is RSAES-OAEP, part of the PKCS#1 standard.
"PKCS#1" is not enough information to communicate to someone the
encryption scheme in use.  Refer to the scheme Zuul uses as "PKCS#1-OAEP"
or "pkcs1-oaep" to clarify.

Change-Id: I74dcde6fa3756354ce65233c64c6189d1b241e90
diff --git a/tests/encrypt_secret.py b/tests/encrypt_secret.py
index ab2c1df..b8524a0 100644
--- a/tests/encrypt_secret.py
+++ b/tests/encrypt_secret.py
@@ -27,7 +27,7 @@
         private_key, public_key = \
             encryption.deserialize_rsa_keypair(f.read())
 
-    ciphertext = encryption.encrypt_pkcs1(sys.argv[1], public_key)
+    ciphertext = encryption.encrypt_pkcs1_oaep(sys.argv[1], public_key)
     print(ciphertext.encode('base64'))
 
 if __name__ == '__main__':