Temporary use 'analytics-store' as s1 slave

s1-analytics-slave.eqiad.wmnet currently suffers huge replication
lag [1], which will start to affect the jobs that we're running
daily. Since analytics-store.eqiad.wmnet is a slave of s1 that serves
current data, we temporary use it, until
s1-analytics-slave.eqiad.wmnet recovered.

[1] http://lists.wikimedia.org/pipermail/analytics/2014-May/001971.html

Change-Id: Iea8f68d5d7a79e7a9d3251857d823227e20346ad