Correctly set lifecycle on LB resources

[KashifSaadat]

When the cluster is configured with an ELB, the following resources show up on every update as requiring changes:

Will modify resources:
  DNSName/api.kash-kops.example.com
  	Lifecycle           	 <nil> -> Sync

    LoadBalancer/api.kash-kops.example.com
    	Lifecycle           	 <nil> -> Sync

    LoadBalancerAttachment/api-master-eu-west-1a
    	Lifecycle           	 <nil> -> Sync

    LoadBalancerAttachment/api-master-eu-west-1b
    	Lifecycle           	 <nil> -> Sync

    LoadBalancerAttachment/api-master-eu-west-1c
    	Lifecycle           	 <nil> -> Sync

This PR sets the lifecycle property on the above awstask objects.

[KashifSaadat]

/assign @justinsb

[k8s-ci-robot]

Hi @KashifSaadat. Thanks for your PR.

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[justinsb]

/ok-to-test

/lgtm

Good find, @KashifSaadat

[k8s-github-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: KashifSaadat, justinsb

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[k8s-github-robot]

/test all [submit-queue is verifying that this PR is safe to merge]

[k8s-github-robot]

Automatic merge from submit-queue