fix: add back python 2.7 for gcloud usage only (#892)

* fix: add back python 2.7 for gcloud

* fix: fix setup and tests

* fix: add enum34 for python 2.7

* fix: add app engine app and fix noxfile

* fix: move test_app_engine.py

* fix: fix downscoped

* fix: fix downscoped

* fix: remove py2 from classifiers
diff --git a/tests/crypt/test_es256.py b/tests/crypt/test_es256.py
index 720f74c..5bb9050 100644
--- a/tests/crypt/test_es256.py
+++ b/tests/crypt/test_es256.py
@@ -50,7 +50,7 @@
 
 
 class TestES256Verifier(object):
-    def test_verify_bytes_success(self):
+    def test_verify_success(self):
         to_sign = b"foo"
         signer = es256.ES256Signer.from_string(PRIVATE_KEY_BYTES)
         actual_signature = signer.sign(to_sign)
@@ -58,8 +58,8 @@
         verifier = es256.ES256Verifier.from_string(PUBLIC_KEY_BYTES)
         assert verifier.verify(to_sign, actual_signature)
 
-    def test_verify_text_success(self):
-        to_sign = "foo"
+    def test_verify_unicode_success(self):
+        to_sign = u"foo"
         signer = es256.ES256Signer.from_string(PRIVATE_KEY_BYTES)
         actual_signature = signer.sign(to_sign)