Adding Redacted Keys

[clr182]

Goal

Filtering config option is case sensitive and is no longer in line with our notifier spec; as such it should be deprecated in favour of redactedKeys.

Design

Added redactedKeys configuration option, which is case insensitive, as a replacement for the filters configuration option. Additionally due to conflictions the default filters parameters were changed.

Changeset

• Added redactedKeys config option.

• Made redactedKeys case insensitive.

• Changed filters config default parameters from
  {"password", "secret", "Authorization", "Cookie"};
  to
  {"ipAddress", "logLevel"};

• Set refactedKeys config default parameters to
  {"password", "secret", "Authorization", "Cookie"};

Testing

Added and updated tests for filtering mechanism and redactedKeys mechanism.

[tomlongridge]

I think it would be appropriate to set this to the same instance rather than a different array with the same content. Just in case anyone is amending elements in the array.

Suggested change

	public String[] redactedKeys = new String[]{"password", "secret", "Authorization", "Cookie"};
	public String[] filters = new String[]{"password", "secret", "Authorization", "Cookie"};
	public String[] redactedKeys = new String[]{"password", "secret", "Authorization", "Cookie"};
	public String[] filters = redactedKeys;