Cannot disable metrics in native mode

[adutra]

Steps to reproduce:

• Create a quickstart project on quarkus.io with the C* extension;
• Disable metrics in application.properties;
• Run the native tests with mvn clean verify -Dnative.

Expected outcome: the tests pass.

Observed outcome:

ERROR [io.qua.run.Application] (main) Failed to start application (with profile prod): java.lang.IllegalArgumentException: Can't find class DropwizardMetricsFactory (specified by advanced.metrics.factory.class)
    at com.datastax.oss.driver.internal.core.util.Reflection.buildFromConfig(Reflection.java:219)
    at com.datastax.oss.driver.internal.core.util.Reflection.buildFromConfig(Reflection.java:108)
    at com.datastax.oss.driver.internal.core.context.DefaultDriverContext.buildMetricsFactory(DefaultDriverContext.java:605)

This is due to DropwizardMetricsFactory not being registered for reflection, but it should be since that's the driver's default implementation of MetricsFactory, and it also serves as the de facto no-op implementation when metrics are disabled.

┆Issue is synchronized with this Jira Task by Unito

[adutra]

This will likely require some changes in the driver too: JAVA-2927.