Rename and relocate ExemplarsAutoConfiguration

Rename `ExemplarsAutoConfiguration` and relocate it to a diffent
package to make it clear that it is for Prometheus.

Author: philwebb

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/tracing/exemplars/ExemplarsAutoConfiguration.java renamed to spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/tracing/prometheus/PrometheusExemplarsAutoConfiguration.java

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.actuate.autoconfigure.tracing.exemplars;
+package org.springframework.boot.actuate.autoconfigure.tracing.prometheus;
 
 import io.micrometer.tracing.Span;
 import io.micrometer.tracing.Tracer;
@@ -44,7 +44,7 @@
 @ConditionalOnBean(Tracer.class)
 @ConditionalOnClass({ Tracer.class, SpanContextSupplier.class })
 @ConditionalOnEnabledTracing
-public class ExemplarsAutoConfiguration {
+public class PrometheusExemplarsAutoConfiguration {
 
 	@Bean
 	@ConditionalOnMissingBean

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/tracing/exemplars/package-info.java renamed to spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/tracing/prometheus/package-info.java

@@ -17,4 +17,4 @@
 /**
  * Auto-configuration for Prometheus Exemplars with Micrometer Tracing.
  */
-package org.springframework.boot.actuate.autoconfigure.tracing.exemplars;
+package org.springframework.boot.actuate.autoconfigure.tracing.prometheus;

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/resources/META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports

@@ -99,7 +99,7 @@ org.springframework.boot.actuate.autoconfigure.system.DiskSpaceHealthContributor
 org.springframework.boot.actuate.autoconfigure.tracing.BraveAutoConfiguration
 org.springframework.boot.actuate.autoconfigure.tracing.MicrometerTracingAutoConfiguration
 org.springframework.boot.actuate.autoconfigure.tracing.OpenTelemetryAutoConfiguration
-org.springframework.boot.actuate.autoconfigure.tracing.exemplars.ExemplarsAutoConfiguration
+org.springframework.boot.actuate.autoconfigure.tracing.prometheus.PrometheusExemplarsAutoConfiguration
 org.springframework.boot.actuate.autoconfigure.tracing.wavefront.WavefrontTracingAutoConfiguration
 org.springframework.boot.actuate.autoconfigure.tracing.zipkin.ZipkinAutoConfiguration
 org.springframework.boot.actuate.autoconfigure.web.exchanges.HttpExchangesAutoConfiguration

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/tracing/exemplars/ExemplarsAutoConfigurationTests.java renamed to spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/tracing/prometheus/PrometheusExemplarsAutoConfigurationTests.java

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.actuate.autoconfigure.tracing.exemplars;
+package org.springframework.boot.actuate.autoconfigure.tracing.prometheus;
 
 import io.micrometer.observation.Observation;
 import io.micrometer.observation.ObservationRegistry;
@@ -38,18 +38,19 @@
 import static org.mockito.Mockito.mock;
 
 /**
- * Tests for {@link ExemplarsAutoConfiguration}.
+ * Tests for {@link PrometheusExemplarsAutoConfiguration}.
  *
  * * @author Jonatan Ivanov
  */
-class ExemplarsAutoConfigurationTests {
+class PrometheusExemplarsAutoConfigurationTests {
 
 	private final ApplicationContextRunner contextRunner = new ApplicationContextRunner()
 			.withPropertyValues("management.tracing.sampling.probability=1.0",
 					"management.metrics.distribution.percentiles-histogram.all=true")
-			.with(MetricsRun.limitedTo(PrometheusMetricsExportAutoConfiguration.class)).withConfiguration(
-					AutoConfigurations.of(ExemplarsAutoConfiguration.class, ObservationAutoConfiguration.class,
-							BraveAutoConfiguration.class, MicrometerTracingAutoConfiguration.class));
+			.with(MetricsRun.limitedTo(PrometheusMetricsExportAutoConfiguration.class))
+			.withConfiguration(AutoConfigurations.of(PrometheusExemplarsAutoConfiguration.class,
+					ObservationAutoConfiguration.class, BraveAutoConfiguration.class,
+					MicrometerTracingAutoConfiguration.class));
 
 	@Test
 	void shouldNotSupplyBeansIfTracingIsDisabled() {