`update_feature_report` method appears to be missing functionality

[vtnate]

Expected behavior
Timeseries csv output for features should be available.

Actual behavior
https://github.com/urbanopt/urbanopt-reopt-gem/blob/develop/lib/urbanopt/reopt/feature_report_adapter.rb#L170 is not actually implemented in the method.

To Reproduce
Steps to reproduce the behavior:

1. Comment the final rm_rf block in the spec file
2. Run the final test in the spec file
3. Examine the test output: spec/run/example_scenario/1/feature_reports/
   1. Note the lack of this file: feature_report1_timeseries.csv