Prevent ambassador getaddrinfo error logs

[sambaiz]

This prevents that appear the following error logs in large quantities

socat[1581671] E getaddrinfo("statsd-sink", "NULL", {1,0,2,17}, {}): Name does not resolve

This error always occurs.
It is hardcoded here in ambassador and it is mismatched so it seems to fail to resolve name.

It may resolve #945 (or it maybe already resolved)

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This change is 

[sambaiz]

/assign @kunmingg

[kunmingg]

@sambaiz
Can you provide more info in PR description?
When will the error occur and why switch name fix it?
Is there a name mismatch or we hardcode the name somewhere?

Thanks!

[kunmingg]

/ok-to-test

[sambaiz]

@kunmingg
This error always occurs.
It is hardcoded here in ambassador and it is mismatched so it seems to fail to resolve name.

[sambaiz]

/retest

[sambaiz]

/retest

[sambaiz]

/retest

[kunmingg]

/lgtm
/approve

Thanks!

[k8s-ci-robot]

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