The current variable, when there's only one host will result in 'false'
instead of 0, which is a jinja-ism however due to java-ism's "false" is
evaluated to 5 and that makes the index retention policy very wrong.
Change-Id: I2668e17c1cf15fe47842ff349ffa4f71c70257e5
Signed-off-by: Kevin Carter <kevin.carter@rackspace.com>