[#75] Fixing `nil` for discovery_tags.each
[#75] Fixing `nil` for discovery_tags.each

gouketsu/cookbook-elasticsearch,spuder/cookbook-elasticsearch,nbudin/cookbook-elasticsearch,vacay/vcy-elasticsearch,spuder/cookbook-elasticsearch,gilt/cookbook-elasticsearch,michaeld/elasticsearch-cookbook,GemHQ/cookbook-elasticsearch,nbudin/cookbook-elasticsearch,vacay/vcy-elasticsearch,gilt/cookbook-elasticsearch,zzugg/cookbook-elasticsearch,spuder/cookbook-elasticsearch,zzugg/cookbook-elasticsearch,gilt/cookbook-elasticsearch,bavardage/cookbook-elasticsearch,paulczar/cookbook-elasticsearch,nbudin/cookbook-elasticsearch,vacay/vcy-elasticsearch,gouketsu/cookbook-elasticsearch,zzugg/cookbook-elasticsearch,gouketsu/cookbook-elasticsearch