Add NLS Support for gauge map HELP in mqmetrics

[parrobe]

We should consider adding NLS support for the gauge map HELP field so that users can specify the human readable help description is in a specific language rather than in English.

Would require us to subscribe to two METADATA topics in order to create the gauge map:

• The requested language to get the description to use in the HELP field
• The default one (which is English and can be used for the metric name and as a fallback)

[ibmmqmet]

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