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/unit/test_model.py b/tests/unit/test_model.py
index 377193f..45176fa 100644
--- a/tests/unit/test_model.py
+++ b/tests/unit/test_model.py
@@ -313,7 +313,7 @@
     name: pypi-credentials
     data:
       username: test-username
-      password: !encrypted/pkcs1 |
+      password: !encrypted/pkcs1-oaep |
         BFhtdnm8uXx7kn79RFL/zJywmzLkT1GY78P3bOtp4WghUFWobkifSu7ZpaV4NeO0s71YUsi1wGZZ
         L0LveZjUN0t6OU1VZKSG8R5Ly7urjaSo1pPVIq5Rtt/H7W14Lecd+cUeKb4joeusC9drN3AA8a4o
         ykcVpt1wVqUnTbMGC9ARMCQP6eopcs1l7tzMseprW4RDNhIuz3CRgd0QBMPl6VDoFgBPB8vxtJw+