AWS EBS CSI Driver Helm chart to inject environment variables

[tomdymond]

Fixes issue #722

Allows setting environment variables in values. For example:

controller:
  extraVars:
    AWS_STS_REGIONAL_ENDPOINTS: regional

I need this in order to run in an environment with no internet access

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[coveralls]

Pull Request Test Coverage Report for Build 1776

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 81.789%

---

Totals
Change from base Build 1768:	0.0%
Covered Lines:	1756
Relevant Lines:	2147

---

💛 - Coveralls

[tomdymond]

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ok

[tomdymond]

I signed it

[tomdymond]

/check-cla

[ayberk]

I guess this is fine as @krmichel will do this regardless.

Can you update the chart version though (just the patch field)? Otherwise releaser fails.

[tomdymond]

Thanks for checking. I've done this now

[krmichel]

Mine will be slightly different as I have added the ability to set env vars for each of the containers in the controller pod.
krmichel@e0261ec#diff-cd438cefb202fb6fb653f659771ea635aa04dd99bb6d0902a0ab8eabebcf0a1eR68

[ayberk]

/lgtm
/approve

Thanks!

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ayberk, tomdymond

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