DependenciesAreResolved validates that the `target` container can be transitioned given the current known state of the containers in `by`.

ValidDependencies takes a task and verifies that it is possible to allow all containers within it to reach the desired status by proceeding in some order.

ContainerPastDesiredStatusErr is the error where the container status is bigger than desired status.

CredentialsNotResolvedErr is the error where a container needs to wait for credentials before it can process by agent.

DependentContainerNotResolvedErr is the error where a dependent container isn't in expected state.