Use Meter.Id for logging in DynatraceExporterV2

[izeye]

This PR changes to use Meter.Id for logging in DynatraceExporterV2 as it might help to understand #3560 or similar a bit better.

[shakuzen]

Heads up to @pirgeo about this change.

[pirgeo]

What additional info will be printed that way? I assume tags are included, right?

[shakuzen]

Yes, it will include the meter name and tags:

micrometer/micrometer-core/src/main/java/io/micrometer/core/instrument/Meter.java

Lines 346 to 349 in 4c00160

	@Override
	public String toString() {
	return "MeterId{" + "name='" + name + '\'' + ", tags=" + tags + '}';
	}