Migrate the dynamic creds module to tempest lib

This commit migrates the dynamic credentials provider from
tempest/common into tempest/lib.

Change-Id: Id8d60e4d7c22bc72c3e48bc768509ff0cc0c89d5

doc/source/library.rst

@@ -68,3 +68,4 @@ Current Library APIs
    library/api_microversion_testing
    library/auth
    library/clients
+   library/credential_providers

doc/source/library/credential_providers.rst

@@ -0,0 +1,16 @@
+.. _cred_providers:
+
+Credential Providers
+====================
+
+These library interfaces are used to deal with allocating credentials on demand
+either dynamically by calling keystone to allocate new credentials, or from
+a list of preprovisioned credentials.
+
+
+------------------------------
+The dynamic credentials module
+------------------------------
+
+.. automodule:: tempest.lib.common.dynamic_creds
+   :members:

releasenotes/notes/migrate-dynamic-creds-ecebb47528080761.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    The tempest module tempest.common.dynamic creds which is used for
+    dynamically allocating credentials has been migrated into tempest lib.

tempest/cmd/account_generator.py

@@ -102,8 +102,8 @@ from oslo_log import log as logging
 import yaml
 
 from tempest.common import credentials_factory
-from tempest.common import dynamic_creds
 from tempest import config
+from tempest.lib.common import dynamic_creds
 
 
 LOG = None

tempest/common/credentials_factory.py

@@ -14,10 +14,10 @@
 from oslo_concurrency import lockutils
 
 from tempest import clients
-from tempest.common import dynamic_creds
 from tempest.common import preprov_creds
 from tempest import config
 from tempest.lib import auth
+from tempest.lib.common import dynamic_creds
 from tempest.lib import exceptions
 
 CONF = config.CONF

tempest/tests/cmd/test_account_generator.py

@@ -140,7 +140,8 @@ class TestGenerateResourcesV2(base.TestCase, MockHelpersMixin):
 
     identity_version = 2
     cred_client = 'tempest.lib.common.cred_client.V2CredsClient'
-    dynamic_creds = 'tempest.common.dynamic_creds.DynamicCredentialProvider'
+    dynamic_creds = ('tempest.lib.common.dynamic_creds.'
+                     'DynamicCredentialProvider')
 
     def setUp(self):
         super(TestGenerateResourcesV2, self).setUp()
@@ -245,7 +246,8 @@ class TestDumpAccountsV2(base.TestCase, MockHelpersMixin):
 
     identity_version = 2
     cred_client = 'tempest.lib.common.cred_client.V2CredsClient'
-    dynamic_creds = 'tempest.common.dynamic_creds.DynamicCredentialProvider'
+    dynamic_creds = ('tempest.lib.common.dynamic_creds.'
+                     'DynamicCredentialProvider')
     domain_is_in = False
 
     def setUp(self):

tempest/tests/lib/common/test_dynamic_creds.py

@@ -17,8 +17,8 @@ import mock
 from oslo_config import cfg
 
 from tempest.common import credentials_factory as credentials
-from tempest.common import dynamic_creds
 from tempest import config
+from tempest.lib.common import dynamic_creds
 from tempest.lib.common import rest_client
 from tempest.lib import exceptions as lib_exc
 from tempest.lib.services.identity.v2 import identity_client as v2_iden_client
@@ -659,7 +659,7 @@ class TestDynamicCredentialProviderV3(TestDynamicCredentialProvider):
         creds = dynamic_creds.DynamicCredentialProvider(**self.fixed_params)
         creds.creds_client = mock.MagicMock()
         creds.creds_client.create_user_role.side_effect = lib_exc.Conflict
-        with mock.patch('tempest.common.dynamic_creds.LOG') as log_mock:
+        with mock.patch('tempest.lib.common.dynamic_creds.LOG') as log_mock:
             creds._create_creds()
             log_mock.warning.assert_called_once_with(
                 "Member role already exists, ignoring conflict.")