In preparation for rewriting LoadBalancerSourceRanges validation,
add/update the existing unit tests to cover some of the more exciting
edge cases of the existing validation code:
- The values in service.Spec.LoadBalancerSourceRanges are allowed to
have arbitrary whitespace around them.
- The annotation must be unset for non-LoadBalancer services, but
for LoadBalancer services, "set but empty" and "whitespace-only"
are treated the same as "unset".
- The annotation value is only validated if the field is not set.
Also fix some of the existing tests to be more precise about what they
are testing.
Also fix the CIDR values to actually be valid. Sigh.
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