Drop all Cirrus content indexes down to 5 shards

Because we have 16 nodes in the cluster 5 shards allows even distribution
of the three copies we keep of the index.  This should be faster then our
previous configuration.

Change-Id: I306abbb234b1769ad37efa9d8b6d838f1102ea59
Switch all wikis to the experimental highlghter

The highlighter has been soaking on commons and enwiki for weeks and weeks
with no complaints.  Its time to convert everyone.

DEPLOYMENT: This might marginally slow down highlighting until the index
is rebuilt.  Since we plan to rebuild indexes while rolling out 1.24wmf10
any way we should time this with the Tuesday roll out for wmf10 so it
gets in before our rebuild then.

Change-Id: I2e7d065fc757f2cd89616879c4e63fe5a044e060
Merge "Drop all Cirrus content indexes down to 5 shards"
Merge "Switch all wikis to the experimental highlghter"