check deployment name before deleting deployment from cache

[nirvanagit]

Current state

Given deployment cache has a valid deployment in its cache
And the deployment does not have an env annotation
And a debug deployment exists, without the env annotation
And debug deployment has the admiral.io/ignore annotation set to true,
And the env key is derived from namespace
When admiral receives an update event for the debug deployment, admiral calls this function
Then, the valid deployment is deleted because the deployment cache stores the deployment by key, which is the same for the valid deployment, as well as the debug deployment.

Change in PR

To prevent admiral from deleting the valid deployment, it will now match the deployment name it found in its cache, with the debug deployment (could be any deployment with ignore annotation, and same identity, and env (which can come from namespace)). The cache will be deleted only when the names match.