This motion cancels referendum 73 (v2014 upgrade) to give space for v2015 on external queue. 

Motion 182 uses `emergency_cancel` instead of `cancel_referendum`, the first motion cancelling ref 73, Motion used the latter call - resulting on BadOrigin error on executing. Not the expected result unfortunately. (Block 3260702)

- The motion cancels a referendum called 73 (v2014 upgrade).
- It is being done to make room for a new version called v2015 on the external queue.
- Motion 182 used the wrong command to cancel the referendum, resulting in an error.
- The error was not the expected result.
- The motion is being made to fix the error.

#182 Motion cancelling referendum 73