* Apply changes from #2146 on current master
Credit for most of these changes goes to https://github.com/viliwonka.
Rebasing three years of changes didn't go so well, so I manually
applied the changes in #2146 on the current master branch.
This commit attempts to represent the changes in #2146 as closely as
possible, no cleanup has been performed yet. Despite this, some changes
were inevitable because part of #2146 has been implemented another way
in the past three years.
* Clean up
* Process review comments
* Add tests
* symbol -> potentialConversionRateSymbol
* Ensure regression tests run/get data
* Fix broken test
* Process review comments
* Process review comments
* Simplify currency conversion logic
* Performance improvement, doc updates and test rename
* Rebase fixes
* Remove obsolete properties
Co-authored-by: Martin-Molinero <martin@quantconnect.com>
Jasper van Merle
bb8bd27fe5