Clean up *.log.1 files during 6.6-to-6.7 upgrade
Clean up *.log.1 files during 6.6-to-6.7 upgrade

8thcolor/rubyconfau2015-sadr,8thcolor/eurucamp2014-htdsadr,8thcolor/eurucamp2014-htdsadr,8thcolor/rubyconfau2015-sadr,8thcolor/eurucamp2014-htdsadr,8thcolor/rubyconfau2015-sadr