When looking up the `no_log` setting for a parameter that is an alias in
`AnsibleModule._log_invocation()`, the alias value will always be an
empty dictionary since `self.aliases` on the `AnsibleModule` instance is
never updated after initialization. Since the `no_log` setting is on the
canonical parameter not the alias, an incorrect warning is issued if the
parameter matches `PASSWORD_MATCH`.
This PR returns the aliases dictionary as an attribute of the
`ValidationResult` and updates the `aliases` attribute on the
`AnsibleModule` instance.
