Trim whitespaces from configured channel and port filters

[ljoss17]

Current process

When verifying the channel and port filter policy Hermes will verify if the list has wildcard values or not.
If there are only exact matches channel scanning will be skipped.

The current solution will not consider a channel or port as an exact match if there is a whitespace, e.g.:

            policy = "allow"
            list = [
                [ "transfer", "channel-1", ],
                [ "transfer", "channel-2 ", ], # Trailing whitespace
            ]

This will trigger channel scanning.

Proposal

Since whitespaces are not allowed in channel or port names, it is acceptable to trim them from the configured values.
This will avoid channel scanning from unimpactful typos.

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