Updated aws-sdk gem 1.44.0 -> 1.45.0
Updated cancancan gem 1.8.3 -> 1.8.4
Updated newrelic_rpm gem 3.8.1.221 -> 3.9.0.229
Updated activeadmin gem to latest master HEAD.
Updated rspec-core 3.0.0 -> 3.0.2
Updated rspec-mocks and rspec-expectations gems 3.0.0 -> 3.0.2