Regenerate protobuf files

tools/gen-criapi was used with the latest protobuf dependencies
to generate compatible files. This makes Zun Compute work again
with the current implementation of protobuf.

In addition, fix two issues that causes gate failure.

Depends-On: https://review.opendev.org/c/openstack/kuryr-libnetwork/+/851549
Closes-Bug: #1982924
Change-Id: Id1032709f6e3b11b718b3df6a6ac3531a9c99824

test-requirements.txt

@@ -19,3 +19,4 @@ testtools>=2.4.0 # MIT
 stestr>=3.1.0 # Apache-2.0
 Pygments>=2.7.2 # BSD license
 python-zunclient>=4.1.0 # Apache-2.0
+WebTest>=2.0.26 # MIT

zun/common/context.py

@@ -18,6 +18,7 @@ from oslo_utils import timeutils
 
 from zun.common import exception
 from zun.common import policy
+from zun.common import utils
 
 
 class RequestContext(context.RequestContext):
@@ -92,7 +93,7 @@ class RequestContext(context.RequestContext):
                       'auth_token_info': self.auth_token_info,
                       'password': self.password,
                       'all_projects': self.all_projects,
-                      'timestamp': timeutils.strtime(self.timestamp) if
+                      'timestamp': utils.strtime(self.timestamp) if
                       hasattr(self, 'timestamp') else None
                       })
         return value