CouchKVStore::readVBState does not log couchstore_open_local_document errors at a visible level

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    errCode = couchstore_open_local_document(db, (void *)id.buf,

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                                             id.size, &ldoc);

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    if (errCode != COUCHSTORE_SUCCESS) {

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        logger.log(EXTENSION_LOG_DEBUG,

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                   "CouchKVStore::readVBState: Failed to "

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                   "retrieve stat info for vBucket: %d with error: %s",

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                   vbId, couchstore_strerror(errCode));