Add tag support to create_stack

Ported from python-openstacksdk [1]. When creating a heat stack, this
commit adds tag support, as specified by [2]

[1] https://review.openstack.org/#/c/525174/
[2] https://developer.openstack.org/api-ref/orchestration/v1/#create-stack

Change-Id: Id8495e9ca09f592aad83338b72878a3c40f8e27f

releasenotes/notes/add_heat_tag_support-0668933506135082.yaml

@@ -0,0 +1,7 @@
+---
+features:
+  - |
+    Add tags support when creating a stack, as specified by the openstack
+    orchestration api at [1]
+
+    [1]https://developer.openstack.org/api-ref/orchestration/v1/#create-stack

shade/openstackcloud.py

@@ -1279,7 +1279,7 @@ class OpenStackCloud(
                 "Error in processing template files: %s" % str(e))
 
     def create_stack(
-            self, name,
+            self, name, tags=None,
             template_file=None, template_url=None,
             template_object=None, files=None,
             rollback=True,
@@ -1289,6 +1289,7 @@ class OpenStackCloud(
         """Create a stack.
 
         :param string name: Name of the stack.
+        :param tags: List of tag(s) of the stack. (optional)
         :param string template_file: Path to the template.
         :param string template_url: URL of template.
         :param string template_object: URL to retrieve template object.
@@ -1318,6 +1319,7 @@ class OpenStackCloud(
             files=files)
         params = dict(
             stack_name=name,
+            tags=tags,
             disable_rollback=not rollback,
             parameters=parameters,
             template=template,

shade/tests/unit/test_stack.py

@@ -26,6 +26,7 @@ class TestStack(base.RequestsMockTestCase):
         super(TestStack, self).setUp()
         self.stack_id = self.getUniqueString('id')
         self.stack_name = self.getUniqueString('name')
+        self.stack_tag = self.getUniqueString('tag')
         self.stack = fakes.make_fake_stack(self.stack_id, self.stack_name)
 
     def test_list_stacks(self):
@@ -304,6 +305,7 @@ class TestStack(base.RequestsMockTestCase):
                         'files': {},
                         'parameters': {},
                         'stack_name': self.stack_name,
+                        'tags': self.stack_tag,
                         'template': fakes.FAKE_TEMPLATE_CONTENT,
                         'timeout_mins': 60}
                 )),
@@ -327,6 +329,7 @@ class TestStack(base.RequestsMockTestCase):
 
         self.cloud.create_stack(
             self.stack_name,
+            tags=self.stack_tag,
             template_file=test_template.name
         )
 
@@ -350,6 +353,7 @@ class TestStack(base.RequestsMockTestCase):
                         'files': {},
                         'parameters': {},
                         'stack_name': self.stack_name,
+                        'tags': self.stack_tag,
                         'template': fakes.FAKE_TEMPLATE_CONTENT,
                         'timeout_mins': 60}
                 )),
@@ -383,6 +387,7 @@ class TestStack(base.RequestsMockTestCase):
         ])
         self.cloud.create_stack(
             self.stack_name,
+            tags=self.stack_tag,
             template_file=test_template.name,
             wait=True)