* Datasource/Cloudwatch: Adds support for Cloudwatch Logs
* Fix rebase leftover
* Use jsurl for AWS url serialization
* WIP: Temporary workaround for CLIQ metrics
* Only allow up to 20 log groups to be selected
* WIP additional changes
* More changes based on feedback
* More changes based on PR feedback
* Fix strict null errors
* Calculate min period based on time range and no of queries
* Use hardcoded array of periods if period is not defined actively by the user
* Fix broken tests
* Use a smaller max period for auto interval
* Fix broken tests
* Test period calculation
* Test min retention period
* Fix broken test
* Remove highres flag since it's not being used
* Remove not used code. Init id field correctly
* Fix broken tests
* Remove GMS related calculations
* Rename period field
* Add breaking changes to changelog. Also update upgrading docs
* Update snapshot
* Update docs after feedback
* Changes after feedback
* CloudWatch: Datasource improvements
* Add statistic as template variale
* Add wildcard to list of values
* Template variable intercept dimension key
* Return row specific errors when transformation error occured
* Add meta feedback
* Make it possible to retrieve values without known metrics
* Add curated dashboard for EC2
* Fix broken tests
* Use correct dashboard name
* Display alert in case multi template var is being used for some certain props in the cloudwatch query
* Minor fixes after feedback
* Update dashboard json
* Update snapshot test
* Make sure region default is intercepted in cloudwatch link
* Update dashboards
* Include ec2 dashboard in ds
* Do not include ec2 dashboard in beta1
* Display actual region
