1. Change from each to each_value since we did not use key
2. drop assignment of value to sum in test
Merge pull request #9782 from vipulnsward/change_from_each_to_each_key_habtm

Change from each to each_value;drop assignment in habtm
Revert "instruct RDoc to only parse Ruby files under lib [Fixes #9779]"

This reverts commit c24528fbc94dea9946a563be3bed9559583bdc57.
Fix failing tests related to where values change to strings

Introduced in 5dc2e3531babcbdc165884d1a47cbcd13455522d.
Use ruby-oci8 master