Updated ES, brought a few modification to the API along with it. Yaml test suite is now built against a specific version of elasticsearch when you specify the es_branch arg

to `grunt test`

scripts/jenkins.sh

@@ -1,7 +1,8 @@
 #!/bin/bash
 
+
 # generate the latest version of the yaml-tests
-node scripts/generate/ --no-api 2>&1 > /dev/null
+node scripts/generate/ --no-api --es_version="=$ES_V"
 
 export VERBOSE="true"