update to es6-rc2

[p365labs]

This PR will

• update the docker image to ES6 RC2
• removed xdebug 2.4 from the Dockerfile as it could lead to some errors on TRAVIS. Travis already has xdebug
• solves a BC break on innerHits Query

[ruflin]

Thanks for the PR. Any chance you could move the innerHits change to an other PR?

For the xdebug part: How does it help that xdebug is already part of Travis as these tests run inside the docker containers?

[p365labs]

The problem splitting the PR is that the BC has been introduced exactly by the RC2. So testInnerHitsNested will fail and so the build if I split the PR in two PR's.

It's a bit weird they have introduced this BC in ES-6-beta2 and then introduced (in RC2) the BC Break of a BC Break...
It shows to Elastic is working hard in order to release the new ES6.ù

Xdebug, it's ok, it's tru what u said. It's that I noticed that sometimes tests fail due to this error :

Step 6/13 : RUN pecl install xdebug-2.4.0
 ---> Running in b33bc5554f34
Package "xdebug" Version "2.4.0" does not have REST xml available
install failed

and I still don't understand, I thought removing it will solve the problem. Maybe I need to inspect on that more ;)

[ruflin]

PR merged. For the xdebug issue: As far as I remember xdebug is needed for the coverage report, so I think we still need it but we should fix the above issue. Perhaps it's just an old version? Haven't looked at xdebug in ages.