Fix invalid values when setting config options' default value

Config options v3_endpoint_type, v2_public_endpoint_type and
v2_admin_endpoint_type only allow dedicated values[1],
oslo.config 4.0 will check overridden value type by default[2],
so need remove invalid overridden values.

[1] https://github.com/openstack/tempest/blob/0d93900ba6d7daaebb1886918573431af3af50dc/tempest/config.py#L145-L164
[2] https://review.openstack.org/#/c/328692/

Closes-Bug: #1517839

Change-Id: I86cc9e53b86a69357254b68ba564df716a2284a5
diff --git a/tempest/tests/fake_config.py b/tempest/tests/fake_config.py
index 71a4c81..4e957a0 100644
--- a/tempest/tests/fake_config.py
+++ b/tempest/tests/fake_config.py
@@ -93,12 +93,6 @@
         self.conf.set_default('ca_certificates_file', '/fake/certificates',
                               group='identity')
         self.conf.set_default('region', 'fake_region', 'identity')
-        # Identity endpoints
-        self.conf.set_default('v3_endpoint_type', 'fake_v3_uri', 'identity')
-        self.conf.set_default('v2_public_endpoint_type', 'fake_v2_public_uri',
-                              'identity')
-        self.conf.set_default('v2_admin_endpoint_type', 'fake_v2_admin_uri',
-                              'identity')
         # Compute default values
         self.conf.set_default('build_interval', 88, group='compute')
         self.conf.set_default('build_timeout', 8, group='compute')