updating helm to support windows

[brycahta]

Issue #, if available: N/A

Description of changes:

• updates to helm daemonsets, values, and helper to support Windows

Testing:

• setup eks cluster with linux and windows nodes
• built and uploaded aemm Windows image to a "test" dockerhub repo
• used my local workspace as the aemm download path for NTH e2e tests
• AEMM pod runs on Windows node successfully
• all NTH e2e tests pass on Windows node using AEMM

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[cjerad]

Nice work

[brycahta]

Updates from latest push:

• addressed PR comments
• updating upload-resources-to-github to check for existence before adding to list of artifacts to upload
  • needed for Windows
• added Windows binary + image build to travis
• added Windows deployments to travis

Testing:

• Submitted changes to a local branch
• Kicked off Windows deployments via Travis on my fork: https://travis-ci.org/github/brycahta/amazon-ec2-metadata-mock/builds/710921663
• Fork'd repo release assets updated: https://github.com/brycahta/amazon-ec2-metadata-mock/releases
• Dockerhub repo images added: https://hub.docker.com/repository/docker/brycahta/dockerhub-testing/tags?page=1

sent from my not-a-windows machine

[cjerad]

Nice work