…lastic#923.

…lastic#923.

…lastic#923)

In order to prevent tasks state updates by stale executors, this commit adds a check for correct allocation id during status update operation.

)

In order to prevent tasks state updates by stale executors, this commit adds a check for correct allocation id during status update operation.

…stic#923)

Later versions of the Elasticsearch API mandate a `name` parameter to the
`exists_alias` method. This commit updates the tests to include that
parameter.

Additionally, there are some fixes to move towards an "inclusion" list
of policies to delete, rather than an "exclusion" list.