Update configuring_aws.adoc

[kalexand-rh]

Update the document to conform with:
kubernetes-retired/kube-aws#1025
https://github.com/kubernetes/kubernetes/blob/v1.8.3/pkg/cloudprovider/providers/aws/tags.go#L44-L51

From #8859

[kalexand-rh]

/cherrypick enterprise-3.10

[kalexand-rh]

/cherrypick enterprise-3.9

[kalexand-rh]

/cherrypick enterprise-3.7

[openshift-cherrypick-robot]

@kalexand-rh: new pull request created: #10500

In response to this:

/cherrypick enterprise-3.10

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[openshift-cherrypick-robot]

@kalexand-rh: new pull request created: #10501

In response to this:

/cherrypick enterprise-3.9

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[kalexand-rh]

/cherrypick enterprise-3.6

[openshift-cherrypick-robot]

@kalexand-rh: new pull request created: #10502

In response to this:

/cherrypick enterprise-3.7

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[openshift-cherrypick-robot]

@kalexand-rh: #10434 failed to apply on top of branch "enterprise-3.6":

.git/rebase-apply/patch:21: trailing whitespace.
Set the corresponding value to `owned` if the node belongs exclusively to the 
.git/rebase-apply/patch:40: trailing whitespace.
be labeled with the `kubernetes.io/cluster/<clusterid>,Value=(owned|shared)` 
warning: 2 lines add whitespace errors.
error: Failed to merge in the changes.
Using index info to reconstruct a base tree...
M	install_config/configuring_aws.adoc
Falling back to patching base and 3-way merge...
Auto-merging install_config/configuring_aws.adoc
CONFLICT (content): Merge conflict in install_config/configuring_aws.adoc
Patch failed at 0001 Update configuring_aws.adoc

In response to this:

/cherrypick enterprise-3.6

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[kalexand-rh]

This section isn't in 3.6, so I'm rolling it back to 3.7.