[tasks] Fix tasks decorators being discarded
[tasks] Fix tasks decorators being discarded

At this moment, when a task seems to be first loaded, it immediately throws away the decorators you give it, and just generates a new instance of itself.

In your cog's `__init__`, once you do `self.my_task.start()`, the Loop is remade when it gets to `self.my_task` before executing the `start` function. The original Loop that the cog starts with is where the decorated values are. This fixes that.
khazhyk/discord.py,Harmon758/discord.py,Rapptz/discord.py,rapptz/discord.py,Harmon758/discord.py