Patch: AWS - extend list of known regions

[hodovska]

This is a patch cherry-picked from kubernetes v1.4 commit:
80d4391 - AWS: recognize us-east-2 region: kubernetes/kubernetes#35013

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1400746

[pweil-]

Thanks for the PR. This commit needs to be broken into individual upstreams and named based on the upstream naming conventions mentioned in https://github.com/openshift/origin/blob/master/HACKING.md#cherry-picking-an-upstream-commit-into-origin-why-how-and-when.

I believe that the first commit here would already be included in the ongoing rebase since it is from early November so that may not be needed.

[derekwaynecarr]

@pweil- this is needed for 3.3 and 3.4.

@hodovska - yes, the process for cherry-picking needs to be followed here.

[smarterclayton]

[merge]

[openshift-bot]

continuous-integration/openshift-jenkins/merge SUCCESS (https://ci.openshift.redhat.com/jenkins/job/test_pr_origin/12785/) (Base Commit: a7bca48) (Image: devenv-rhel7_5662)

[openshift-bot]

Evaluated for origin merge up to f99e44b

[openshift-bot]

[Test]ing while waiting on the merge queue

[openshift-bot]

Evaluated for origin test up to f99e44b

[openshift-bot]

continuous-integration/openshift-jenkins/test SUCCESS (https://ci.openshift.redhat.com/jenkins/job/test_pr_origin/12785/) (Base Commit: a7bca48)