#896 Standardize the name of the country 'Russia'

[Ahasuerus]

Update the cleanup report that finds invalid country names to enforce the following convention for Russia:

Prior to 1721-11-02: Russia
1721-11-02 through 1917-09-13: Russian Empire
1917-09-14 through 1922-12-29: Russia
1922-12-30 through 1991-12-25: Russia, USSR
After 1991-12-26: Russia

[Ahasuerus]

Implemented in:

edit/cleanup_report.py 1.39
nightly/nightly_update.py 1.160

Installed in r2016-093 on 2016-06-11. Closing.