Comment 17 for bug 1637070

Reviewed: https://review.opencontrail.org/25423
Committed: http://github.org/Juniper/contrail-controller/commit/e39464ea44b561d9fabb0f1fbaa0be83e326862a
Submitter: Zuul
Branch: R3.0.3.x

commit e39464ea44b561d9fabb0f1fbaa0be83e326862a
Author: Sundaresan Rajangam <email address hidden>
Date: Wed Oct 26 22:24:37 2016 -0700

Fix analytics UT failure due to broken cassandra-driver

cassandra-driver depends on Cython package. Currently, installing
cassandra-driver<=3.7.0 from PyPi or Github master will install the
latest version of Cython rather than a compatible version. The latest
version of Cython (0.25) has broken the cassandra-driver.The version of
Cython that works with cassandra-driver is 0.24.1

Fixed the issue by installing Cython==0.24.1 before installing the
cassandra-driver.

Change-Id: I6934dc1cbed31e82ebace180e781637328e7be34
Closes-Bug: #1637070
(cherry picked from commit c94d63dddfdef719c6622f65606c59e0d0abbef3)