Add a dictionary as a data cache for the pollsters,
creating it outside of the loop where they are
invoked and passing it to them. Future changesets will
include changes to the pollsters to put data in the
cache.
blueprint one-meter-per-plugin
Change-Id: Ie65526dfe65a8880ad8683b62fae62f8e7f9e69b
Signed-off-by: Doug Hellmann <doug.hellmann@dreamhost.com>