Add test to reproduce race condition in update_schedule method
FIX: typo in string interpolation

Typo in string interpolation + renaming the test as suggested by
@meatballhat.
FIX: prevent race conditions in update_schedule

As noted by @rychoo2 in issue #230, the memoizing of Resque.schedule was
causing a race condition. The easy solution was to refresh the hash of
all the schedueles for each of the job handled in the update_schedule
cycle.
Merge pull request #397 from resque/update_schedule-race-condition

update_schedule race condition
Ignoring the latest RuboCop offenses

since @alekst is already addressing them in #395
Merge pull request #399 from meatballhat/ignoring-latest-rubocop-offenses

Ignoring the latest RuboCop offenses
Allowing ruby 2.1.0 to fail (for now)

as the rvm binary install is currently hosed.
Switching from 2.1.0 to 2.1 in travis matrix

as the 2.1.0 binary install is currently busted, but 2.1.1 is fine.
Merge pull request #401 from meatballhat/switch-from-ruby-2.1.0-to-2.1

Switch from ruby 2.1.0 to 2.1
Merge branch 'master' of github.com:resque/resque-scheduler
Correction some Rubocop errors