Fix connection issue
Fix connection issue

When haka run with nfqueue and filter the tcp connection to
elasticsearch, this connection cannot be correctly established. Now, it
will wait for the first operation before really connecting.

Wingless-Archangel/haka,lcheylus/haka,nabilbendafi/haka,Wingless-Archangel/haka,haka-security/haka,lcheylus/haka,nabilbendafi/haka,nabilbendafi/haka,lcheylus/haka,LubyRuffy/haka,LubyRuffy/haka,haka-security/haka,haka-security/haka