Fix some typos

Fix typos detected by toolkit misspellings.

* pip install misspellings
* git ls-files | grep -v locale | misspellings -f -

Change-Id: I858b3fea4badcf6d2af3405b278b243e12fce7e2

api-ref/source/os-cells.inc

@@ -103,7 +103,7 @@ Normal response code: 200
 Error response codes: badRequest(400), unauthorized(401), forbidden(403),
 NotImplemented(501)
 
-.. TODO(cdent): this is weird, data is stuctured entirely differently.
+.. TODO(cdent): this is weird, data is structured entirely differently.
 
 Show Cell Data
 ==============

nova/conf/workarounds.py

@@ -117,7 +117,7 @@ are ignored.
 This is an advanced feature which allows the hypervisor to signal to the
 compute service that an unexpected state change has occurred in an instance
 and that the instance can be shutdown automatically. Unfortunately, this can
-race in some conditions, for exmaple in reboot operations or when the compute
+race in some conditions, for example in reboot operations or when the compute
 service or when host is rebooted (planned or due to an outage). If such races
 are common, then it is advisable to disable this feature.
 

nova/tests/functional/test_legacy_v2_compatible_wrapper.py

@@ -39,7 +39,7 @@ class LegacyV2CompatibleTestBase(test_servers.ServersTestBase):
         self.assertNotIn('Vary', response.headers)
         self.assertNotIn('type', response.body["keypair"])
 
-    def test_request_without_addtional_properties_check(self):
+    def test_request_without_additional_properties_check(self):
         self.api.microversion = '2.100'
         response = self.api.api_post('os-keypairs',
             {"keypair": {"name": "test", "foooooo": "barrrrrr"}})

nova/tests/unit/api/openstack/compute/test_server_external_events.py

@@ -145,7 +145,7 @@ class ServerExternalEventsTestV21(test.NoDBTestCase):
         self.assertRaises(self.invalid_error,
                           self.api.create, self.req, body=body)
 
-    def test_create_unkown_events(self):
+    def test_create_unknown_events(self):
         self.event_1['name'] = 'unkown_event'
         body = {'events': self.event_1}
         self.assertRaises(self.invalid_error,

nova/tests/unit/api/openstack/test_legacy_v2_compatible_wrapper.py

@@ -110,10 +110,10 @@ class TestLegacyV2CompatibleWrapper(test.NoDBTestCase):
         req.get_response(wrapper)
 
 
-class TestSoftAddtionalPropertiesValidation(test.NoDBTestCase):
+class TestSoftAdditionalPropertiesValidation(test.NoDBTestCase):
 
     def setUp(self):
-        super(TestSoftAddtionalPropertiesValidation, self).setUp()
+        super(TestSoftAdditionalPropertiesValidation, self).setUp()
         self.schema = {
             'type': 'object',
             'properties': {

nova/tests/unit/test_hacking.py

@@ -704,7 +704,7 @@ class HackingTestCase(test.NoDBTestCase):
         """
         self._assert_has_no_errors(code6, checks.cfg_help_with_enough_text)
 
-        # The help text uses a paranthesis (weird, but produces a valid string)
+        # The help text uses a parenthesis (weird, but produces a valid string)
         code7 = """
         opt = cfg.StrOpt("opt7",
                          help=("help text uses extra paranthesis"))

nova/virt/libvirt/driver.py

@@ -210,7 +210,7 @@ NEXT_MIN_QEMU_VERSION = (1, 5, 3)
 # Relative block commit & rebase (feature is detected,
 # this version is only used for messaging)
 MIN_LIBVIRT_BLOCKJOB_RELATIVE_VERSION = (1, 2, 7)
-# Libvirt version 1.2.17 is required for successfull block live migration
+# Libvirt version 1.2.17 is required for successful block live migration
 # of vm booted from image with attached devices
 MIN_LIBVIRT_BLOCK_LM_WITH_VOLUMES_VERSION = (1, 2, 17)
 # libvirt discard feature