Close #1137 /claim #1137

Two changes:

1. use getRegion from site.util. the one in augment-site is virtually the same as the one in site.util, only variable name difference, and it does a find but only need the first one of result, which could be the same as findOne
2. update getRegion function to return early. No functionality change, but logic flow is simpler and clear: we return undefined when getGoogleRegion is undefined