Revert "Add retries when loading keystone data and fetching endpoints"

Now that we can use connect_retries with keystone session[1]
for retries, we should revert this change.

This reverts commit 6fb8ac250a.

[1] https://review.opendev.org/676664

Change-Id: I70ad41b12095eede617fd8dc454b5761697ea50a

heat/common/context.py

@@ -12,7 +12,6 @@
 #    under the License.
 
 from keystoneauth1 import access
-from keystoneauth1 import exceptions as ksa_exceptions
 from keystoneauth1.identity import access as access_plugin
 from keystoneauth1.identity import generic
 from keystoneauth1 import loading as ks_loading
@@ -25,7 +24,6 @@ import oslo_messaging
 from oslo_middleware import request_id as oslo_request_id
 from oslo_utils import importutils
 import six
-import tenacity
 
 from heat.common import config
 from heat.common import endpoint_utils
@@ -55,15 +53,6 @@ TRUSTEE_CONF_GROUP = 'trustee'
 ks_loading.register_auth_conf_options(cfg.CONF, TRUSTEE_CONF_GROUP)
 
 
-retry_on_connection_timeout = tenacity.retry(
-    stop=tenacity.stop_after_attempt(cfg.CONF.client_retry_limit+1),
-    wait=tenacity.wait_random(max=2),
-    retry=tenacity.retry_if_exception_type(
-        (ksa_exceptions.ConnectFailure,
-         ksa_exceptions.DiscoveryFailure)),
-    reraise=True)
-
-
 def list_opts():
     trustee_opts = ks_loading.get_auth_common_conf_options()
     trustee_opts.extend(ks_loading.get_auth_plugin_conf_options(
@@ -302,8 +291,6 @@ class RequestContext(context.RequestContext):
 
 
 class StoredContext(RequestContext):
-
-    @retry_on_connection_timeout
     def _load_keystone_data(self):
         self._keystone_loaded = True
         auth_ref = self.auth_plugin.get_access(self.keystone_session)

heat/engine/clients/client_plugin.py

@@ -24,7 +24,6 @@ import requests
 import six
 
 from heat.common import config
-from heat.common import context
 from heat.common import exception as heat_exception
 
 cfg.CONF.import_opt('client_retry_limit', 'heat.common.config')
@@ -94,7 +93,6 @@ class ClientPlugin(object):
     def url_for(self, **kwargs):
         keystone_session = self.context.keystone_session
 
-        @context.retry_on_connection_timeout
         def get_endpoint():
             return keystone_session.get_endpoint(**kwargs)