Test and fix for remove_storage_pool

Author: cderici

juju/model.py

@@ -914,7 +914,7 @@ async def remove_storage_pool(self, name):
         :return:
         """
         storage_facade = client.StorageFacade.from_connection(self.connection())
-        return await storage_facade.RemovePool(pools=[name])
+        return await storage_facade.RemovePool(pools=[client.StoragePoolDeleteArg(name)])
 
     async def update_storage_pool(self, name, attributes=""):
         """ Update storage pool attributes.

tests/integration/test_model.py

@@ -1089,3 +1089,8 @@ async def test_storage_pools(event_loop):
         await model.create_storage_pool("test-pool", "lxd")
         pools = await model.list_storage_pools()
         assert "test-pool" in [p['name'] for p in pools]
+
+        await model.remove_storage_pool("test-pool")
+        await jasyncio.sleep(5)
+        pools = await model.list_storage_pools()
+        assert "test-pool" not in [p['name'] for p in pools]