Refactor

Component(s) to be refactored

• Common.credentials.Credentials

Explanation

The Credentials object represents a many-to-many relationship between identities and secrets. This adds complexity in storage, usage, and serialization. The benefits of this additional complexity are that we can maintain relationships between identities and the amount of data passed between the island and agent is reduced. We don't know that relationships between identities will ever be valuable. The increase in data transfer will likely be minimal and could be mitigated by using compression if it ever became a real issue.

Refactor the Credentials object to contain one single identity and one single secret.

• Modify the object to only have one identity and one secret. Refactor all of the code that uses it. (0d) @mssalvatore
• Modify ControlChannel.get_propagation_credentials to use the simplified Credenetials object. (0d) @mssalvatore
  • Fix aggregating_credentials_store