Update current ES version to 1.5.1
Update current ES version to 1.5.1

nizsheanez/elastic,mruse/elastic,grafov/elastic,guilherme-santos/elastic,dorsha/elastic,cep21/elastic,yonglehou/elastic,CptJason/elastic,olivere/elastic,harrisonchen/elastic,olivere/elastic,hustbill/elastic,gmack/elastic,grafov/elastic,guilherme-santos/elastic,antonikonovalov/elastic,TinLe/elastic