caucase.{client,http}: Trivial coverage improvement.

caucase/client.py

@@ -24,13 +24,15 @@ Caucase - Certificate Authority for Users, Certificate Authority for SErvices
 from __future__ import absolute_import
 try:
   import http.client as http_client
-except ImportError: # BBB: py2.7
+except ImportError: # pragma: no cover
+  # BBB: py2.7
   import httplib as http_client
 import json
 import ssl
 try:
   from urllib.parse import urlparse
-except ImportError: # BBB: py2.7
+except ImportError: # pragma: no cover
+  # BBB: py2.7
   from urlparse import urlparse
 from cryptography import x509
 from cryptography.hazmat.backends import default_backend

caucase/http.py

@@ -35,7 +35,8 @@ import os
 import socket
 try:
   from socketserver import ThreadingMixIn
-except ImportError: # BBB: py2.7
+except ImportError: # pragma: no cover
+  # BBB: py2.7
   from SocketServer import ThreadingMixIn
 import ssl
 import sys
@@ -43,7 +44,8 @@ import tempfile
 from threading import Thread
 try:
   from urllib.parse import urlparse, urlunsplit
-except ImportError: # BBB: py2.7
+except ImportError: # pragma: no cover
+  # BBB: py2.7
   from urlparse import urlparse, urlunsplit
 from wsgiref.simple_server import make_server, WSGIServer
 import ipaddress