Add eu-north-1 region (Stockholm)

[martina-if]

Description

Please explain the changes you made here.

Checklist

• Code compiles correctly (i.e make build)
• Added tests that cover your change (if possible)
• All tests passing (i.e. make test)
• Added/modified documentation as required (such as the README)
• Added yourself to the humans.txt file

[martina-if]

This doesn't seem to be working, yet:

2018-12-13T15:20:00+01:00 [ℹ]  using region eu-north-1
2018-12-13T15:20:02+01:00 [ℹ]  setting availability zones to [eu-north-1b eu-north-1a eu-north-1c]
2018-12-13T15:20:02+01:00 [ℹ]  subnets for eu-north-1b - public:192.168.0.0/19 private:192.168.96.0/19
2018-12-13T15:20:02+01:00 [ℹ]  subnets for eu-north-1a - public:192.168.32.0/19 private:192.168.128.0/19
2018-12-13T15:20:02+01:00 [ℹ]  subnets for eu-north-1c - public:192.168.64.0/19 private:192.168.160.0/19
2018-12-13T15:20:02+01:00 [ℹ]  using "ami-04b0f84e5a05e0b30" for nodes
2018-12-13T15:20:02+01:00 [ℹ]  creating EKS cluster "wonderful-gopher-1544710801" in "eu-north-1" region
2018-12-13T15:20:02+01:00 [ℹ]  will create 2 separate CloudFormation stacks for cluster itself and the initial nodegroup
2018-12-13T15:20:02+01:00 [ℹ]  if you encounter any issues, check CloudFormation console or try 'eksctl utils describe-stacks --region=eu-north-1 --name=wonderful-gopher-1544710801'
2018-12-13T15:20:02+01:00 [ℹ]  creating cluster stack "eksctl-wonderful-gopher-1544710801-cluster"
2018-12-13T15:20:02+01:00 [ℹ]  1 error(s) occurred and cluster hasn't been created properly, you may wish to check CloudFormation console
2018-12-13T15:20:02+01:00 [ℹ]  to cleanup resources, run 'eksctl delete cluster --region=eu-north-1 --name=wonderful-gopher-1544710801'
2018-12-13T15:20:02+01:00 [✖]  creating CloudFormation stack "eksctl-wonderful-gopher-1544710801-cluster": ValidationError: Template format error: Unrecognized resource types: [AWS::EKS::Cluster]
	status code: 400, request id: 2e204259-fee2-11e8-b1ee-2f7a19f5ca09
2018-12-13T15:20:02+01:00 [✖]  failed to create cluster "wonderful-gopher-1544710801"```

[errordeveloper]

Thanks a lot for this! I'd like to roll this into the release that is about to go out today, so I will push a fix to your branch.

[errordeveloper]

I've rebased and re-generated AMI tables, it works now. I am not sure why it didn't work for you first time. It's possible that it was related to version 1.10, now we are on 1.11 and that's what I tested. If you are curious, see if you can reproduce the error with --version=1.10, and open an issue if you find a bug there.