* initial implementation of taskSets. Fixed a bug with ECS Service where task_definition was a required parameter.
* Added update_task_set and tests. DRYed up ClusterNotFoundException. General cleanup.
* Added support for filtering tags on include parameter to describe_task_sets. Added additional tests.
* Fix copy/pasta in ClusterNotFoundException
* styling updates
* Added TODO for delete_task_set force parameter
* Updated multiple function and constructor calls to use named variables. Updated tests to reference variables instead of hardcoded strings.
* Run black for formatting
* Updated create_service function call to use named variables
AWS defines this option as:
```
--family-prefix (string)
The full family name with which to filter the ListTaskDefinitions
results. Specifying a familyPrefix limits the listed task
defini-tions to task definition revisions that belong to that
family.
```
This option behaves differently than ecs:ListTaskDefinitionFamilies.
Instead of doing a comparison like `startswith`, it does a full string
comparison by matching the entire task definition family to the prefix.
For example, let's say there exists a task definition with the family
`super-cool-task-def`.
ListTaskDefinitionFamilies would look like this:
```
aws ecs list-task-definition-families --family-prefix super-cool
{
"families": [
"super-cool-task-def"
]
}
```
ListTaskDefinitions would look like this:
```
aws ecs list-task-definitions --family-prefix super-cool
{
"taskDefinitionArns": []
}
```
* Initialize EC2ContainerServiceBackend and ContainerInstance objects with region_name
* Initialize ContainerInstance with default attributes
* These attributes are automatically applied by ECS when a container is registered
* Docs: http://docs.aws.amazon.com/AmazonECS/latest/developerguide/task-placement-constraints.html#attributes
* Format container_instance.attributes for response_object
* Python3
* Only use available ECS regions for ecs_backends
* Sort dictionaries on key='name' using lambda
* Sort all dicts in tests using lambda
* Uptick boto3 version to version supporting ECS container instance state changes
* Add initial status update
* Only place tasks on active instances
* PEP8 cleanup
