MB-9017: Need to keep reports on lib/python

Since template engine needs template.tmpl for generating docs,
we need to keep another copy under lib/python.

Change-Id: I1dcce2168daa014c51754684db0d72fb4c8f7bd4
Reviewed-on: http://review.couchbase.org/28803
Reviewed-by: Bin Cui <bin.cui@gmail.com>
Tested-by: Bin Cui <bin.cui@gmail.com>