clean up saio env. after runnning func tests

Added call to delete container in teardown_package().
Tests are leaving objects and containers in saio environment
after finishing running the tests.

Currently, delete_containers() is called in the setUp of each test
class, which cleans up the containers of the previous test,
but leaves the containers of the last test in the saio environment.

Change-Id: I643d7083a2a310fc3d24eab48c565f3798cff25f
Signed-off-by: Thiago da Silva <thiago@redhat.com>

test/functional/__init__.py

@@ -32,7 +32,8 @@ from shutil import rmtree
 from tempfile import mkdtemp
 
 from test import get_config
-from test.functional.swift_test_client import Connection, ResponseError
+from test.functional.swift_test_client import Account, Connection, \
+    ResponseError
 # This has the side effect of mocking out the xattr module so that unit tests
 # (and in this case, when in-process functional tests are called for) can run
 # on file systems that don't support extended attributes.
@@ -507,6 +508,12 @@ def teardown_package():
     global orig_collate
     locale.setlocale(locale.LC_COLLATE, orig_collate)
 
+    # clean up containers and objects left behind after running tests
+    conn = Connection(config)
+    conn.authenticate()
+    account = Account(conn, config.get('account', config['username']))
+    account.delete_containers()
+
     global in_process
     if in_process:
         try: