Common tags duplicates meter tags.

Configuring common tags on registry level with combination of meter metrics leads to tags duplication. Steps to reproduce:

1. Configure common metrics though meter registry config
2. Register metric with additional tags
3. Check registered metric id

The issue occurs in MeterFilter.commonTags which concatenates metric tags twice: meter tags + meter tags + common tags

Issue found when I’ve tried to remove such metric from registry. Removal logic applies all MeterFilters again, which leads to tags duplication again and break hashCode contract of Tags.class.

Example: `

    SimpleMeterRegistry registry = new SimpleMeterRegistry();

    registry.config().commonTags("common-key", "common-value");

    Gauge gauge = Gauge.builder("test-gauge", () -> 0L)
            .tags("key", "value")
            .register(registry);

    System.out.print(gauge.getId());

    registry.remove(gauge);

    Assert.isTrue(registry.getMeters().isEmpty(), () -> "Registry is not empty");

` Output:

MeterId{name=‘test-gauge’, tags=[tag(common-key=common-value),tag(key=value),tag(key=value)]} Exception in thread “main” java.lang.IllegalArgumentException: Registry is not empty

[izeye]

I created https://github.com/micrometer-metrics/micrometer/pull/2370 to apply the suggestion from @tommyk-gears above.

[izeye]

@tommyk-gears Thanks for the suggestion. It looks good to me.