[IMPR] tests should always use a developent release
[IMPR] tests should always use a developent release

travis and appveyor uses setup.py to setup the tests environment.
Their version number should create an developmental release

Change-Id: Iffbb36bc43231afbc8502abccfe121b1c63d16ec

wikimedia/pywikibot-core,wikimedia/pywikibot-core,PersianWikipedia/pywikibot-core