Revert "added valuesabsolute and valuespercentage options to the df plugin"

This reverts commit d0b94f773cbe7366148d0e55aa613d275c311e70.
Revert "added sort method to hash iteration in python.conf.erb"

This reverts commit fb0cffeeb1aed98043efd79d26fbd5d5a7ea7e24.