Bundle update
Merge pull request #108 from tanaka51-jp/bundle-update

Bundle update
Use argument value instead of `let` value
Use login macro
Add require
Flatten under spec/features
Extract shared_context
Merge pull request #110 from tanaka51-jp/refactoring-feature-spec

Refactoring feature spec
Add in_monitor_agent setting
Add out_stdout setting
Add http input settings.
Add feature spec for in_http setting.
Make link to select an input type DRY.
Add forward input settings.
Add feature spec for in_forward setting.
Refactor feature specs for settings.