• Replace the extended wait_for_dcos_ee timeout with a preceding dcos-diagnostics check.

• Extend wait_for_dcos_ee timeout for waiting until the DC/OS CA cert can be fetched.

• Backwards incompatible change: Introduce separate wait_for_dcos_oss and wait_for_dcos_ee methods.
  Both methods improve the boot process waiting time for the corresponding DC/OS version.
• Backwards incompatible change: run_integration_tests now requires to call wait_for_dcos_oss or wait_for_dcos_ee beforehand.

• Remove ExistingCluster backend and replaced it with simpler Cluster.from_nodes method.
• Simplified the default configuration for the Docker backend.
  Notably this no longer contains a default superuser_username or superuser_password_hash.
• Support custom_agent_mounts and custom_public_agent_mounts on the Docker backend.

• Remove destroy_on_error and destroy_on_success from Cluster.
  Instead, avoid using Cluster as a context manager to keep the cluster alive.

• Backwards incompatible change: Rename DCOS_Docker backend to Docker backend.
• Backwards incompatible change: Replace generate_config_path with build_artifact that can either be a pathlib.Path or a HTTP(S) URL string.
• Backwards incompatible change: Remove run_as_root. Instead require a default_ssh_user for backends to run commands over SSH on any cluster Node created with this backend.
• Backwards incompatible change: Split the DC/OS installation from the ClusterManager's __init__ procedure.
• Backwards incompatible change: Explicit distinction of installation methods by providing separate methods for install_dcos_from_path and install_dcos_from_url instead of inspecting the type of build_artifact.
• Backwards incompatible change: log_output_live is no longer an attribute of the Cluster class. It may now be passed separately as a parameter for each output-generating operation.

• Added Node.send_file to allow files to be copied to nodes.
• Added custom_master_mounts to the DC/OS Docker backend.
• Backwards incompatible change: Removed files_to_copy_to_masters.
  Instead, use custom_master_mounts or Node.send_file.

• Added Apache2 license.
• Repository moved to https://github.com/mesosphere/dcos-e2e.
• Added run, which is similar to run_as_root but takes a user argument.
• Added popen, which can be used for running commands asynchronously.

Fixed an issue preventing integration tests from working in some situations.

• Fixed issue which prevented files_to_copy_to_installer from working.