sequence of functions does not work

[Georgy Okrokvertskhov]

     Separate functions work fine as in an example below:
      - $l: $list.skip($start)
      - Return: $l.take($count)
but sequenced form $list.skip($start).take($count) does not work and fails with can't run functions f() (take)

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/121504

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/121504
Committed: https://git.openstack.org/cgit/stackforge/murano/commit/?id=dd7f6b3db9af8e24158f7ee4033e42d1c3ef5ad3
Submitter: Jenkins
Branch: master

commit dd7f6b3db9af8e24158f7ee4033e42d1c3ef5ad3
Author: Stan Lagun <email address hidden>
Date: Mon Sep 15 14:44:51 2014 +0400

    $list.skip($start).take($count) throw YAQL exception

    It was possible to have
     - $l: $list.skip($start)
     - Return: $l.take($count)

    but not $list.skip($start).take($count)

    Change-Id: I58709f9c994ad22497ff23662a1fc0c9c2d1e88d
    Closes-Bug: #1365146