Enable all extension for all remaining sample tests

As extensions options has been deprecated, API sample tests
should run against all extension enable.

This commit enables all extensions for all the remaining sample tests
and remove extensions specific tests and sample files.

Also remove extension setting specific logic from base test class
along with TODOs.

Partially implements blueprint api-sample-tests-with-all-extensions

Change-Id: I66b593760789e5b3b92137a672246f8d91e44cba

nova/tests/functional/api_sample_tests/api_sample_base.py

@@ -61,7 +61,6 @@ class ApiSampleTestBaseV21(testscenarios.WithScenarios,
     # any additional fixtures needed for this scenario
     _additional_fixtures = []
     sample_dir = None
-    extra_extensions_to_load = None
     _project_id = True
 
     scenarios = [
@@ -83,18 +82,6 @@ class ApiSampleTestBaseV21(testscenarios.WithScenarios,
         self.flags(use_ipv6=False,
                    osapi_compute_link_prefix=self._get_host(),
                    osapi_glance_link_prefix=self._get_glance_host())
-        if not self.all_extensions:
-            # Set the whitelist to ensure only the extensions we are
-            # interested in are loaded so the api samples don't include
-            # data from extensions we are not interested in
-            whitelist = API_V21_CORE_EXTENSIONS.copy()
-            if self.extension_name:
-                whitelist.add(self.extension_name)
-            if self.extra_extensions_to_load:
-                whitelist.update(set(self.extra_extensions_to_load))
-
-            CONF.set_override('extensions_whitelist', whitelist,
-                              'osapi_v21')
 
         # load any additional fixtures specified by the scenario
         for fix in self._additional_fixtures: