Change aug_mv test to avoid triggering a bug in augeas 0.3.0
Change aug_mv test to avoid triggering a bug in augeas 0.3.0

uib/ruby-augeas,uib/ruby-augeas,lutter/ruby-augeas,lutter/ruby-augeas,hercules-team/ruby-augeas,joshuaspence/ruby-augeas,hercules-team/ruby-augeas,applewiskey/ruby-augeas,joshuaspence/ruby-augeas,applewiskey/ruby-augeas