caucase.test: Remove coverage expectation on a few code paths.

4 branches depend on how tests are written, and are indeed not currently
used.
1 branch depend on test process environment.

caucase/test.py

@@ -410,9 +410,9 @@ class CaucaseTest(unittest.TestCase):
     """
     Build a reasonably-realistic CA, return key & self-signed cert.
     """
-    if not_before is None:
+    if not_before is None: # pragma: no cover
       not_before = datetime.datetime.utcnow()
-    if not_after is None:
+    if not_after is None: # pragma: no cover
       not_after = not_before + datetime.timedelta(10, 0)
     private_key = utils.generatePrivateKey(2048)
     subject = x509.Name([
@@ -479,9 +479,9 @@ class CaucaseTest(unittest.TestCase):
     """
     Build a reasonably-realistic signed cert, return key & self-signed cert.
     """
-    if not_before is None:
+    if not_before is None: # pragma: no cover
       not_before = datetime.datetime.utcnow()
-    if not_after is None:
+    if not_after is None: # pragma: no cover
       not_after = not_before + datetime.timedelta(10, 0)
     crt_key = utils.generatePrivateKey(2048)
     return crt_key, x509.CertificateBuilder(
@@ -2990,7 +2990,7 @@ class CaucaseTest(unittest.TestCase):
     os.unlink(self._server_key)
     os.unlink(self._server_db)
     port = urlparse.urlparse(self._caucase_url).port
-    if port:
+    if port: # pragma: no cover
       netloc += ':%s' % port
     self._server_netloc = netloc
     self._caucase_url = 'http://' + netloc