* Updated `aws_elastic_beanstalk_environment` to update environment when the `template_name` attribute has a change. Consildated update functions to use a single update call and added state change conf to wait until environment is in a "Ready" state.
* Adding tests for `aws_elastic_beanstalk_configuration_template` use with the `aws_elastic_beanstalk_environment` resource.
* Verifies option settings from an `aws_elastic_beanstalk_configuration_template` resource are applied to the associated `aws_elastic_beanstalk_environment` resource
* Verifies updated name of an `aws_elastic_beanstalk_configuration_template` resource triggers an update for the associated `aws_elastic_beanstalk_environment` resource
* Verifies that option settings set in the `aws_elastic_beanstalk_environment` resource override settings in the `aws_elastic_beanstalk_configuration_template` resource
This adds support for Elastic Beanstalk Applications, Configuration Templates,
and Environments.
This is a combined work of @catsby, @dharrisio, @Bowbaq, and @jen20
David Harris