Fix/exclude add when initial zappa setting

[kyaryunha]

Description

My prev pull request is bad because it always disable boto.

So I code a new idea about this mention.
#1235 (comment)

GitHub Issues

My Prev Pull Request: #1235
Issue: #1241

[monkut]

Can you add a testcase to confirm the results of this?

[coveralls]

coverage: 74.736%. remained the same
when pulling 3747f83 on kyaryunha:zappa-settings-add-exclude
into dd5d1f3 on zappa:master.

[kyaryunha]

I wrote a test code to check if excludes are properly included in zappa_settings when I run zappa init.

It's the first time I've written test code in Python, so I'd appreciate it if you could check if the test code was written clearly.

In addition, when there is something in the exclude, please tell me if you need to write a test code to see if it is excluded well in the zip.

thank you!

[sridhar562345]

@kyaryunha
This pull request is not backward compatible and might affect users who have older zappa_settings.json.

I feel it should be labeled as a breaking change.

[kyaryunha]

Yes, this code conflicts with the old zappa_settings.json.
I think it would be nice to do it when updating a large version.

[kyaryunha]

Ah.. ci failed...
I'll think about it again and fix it this week.

[kyaryunha]

I fixed my test code. Could you please run ci again?