Fix Dynatrace Token-Name property (#341)

During the migration to the new configuration properties, there was an oversight with
the new Dynatrace token name property `sap.dynatrace.cf.binding.token.name` which
was not considered. This change fixes the issue, so that the new and the deprecated
property will be considered.

Signed-off-by: Karsten Schnitter <k.schnitter@sap.com>

Author: KarstenSchnitter

cf-java-logging-support-opentelemetry-agent-extension/src/main/java/com/sap/hcf/cf/logging/opentelemetry/agent/ext/exporter/DynatraceMetricsExporterProvider.java

@@ -3,8 +3,8 @@
 import com.sap.hcf.cf.logging.opentelemetry.agent.ext.binding.CloudFoundryCredentials;
 import com.sap.hcf.cf.logging.opentelemetry.agent.ext.binding.CloudFoundryServiceInstance;
 import com.sap.hcf.cf.logging.opentelemetry.agent.ext.binding.DynatraceServiceProvider;
-import com.sap.hcf.cf.logging.opentelemetry.agent.ext.config.ExtensionConfigurations.DEPRECATED;
 import com.sap.hcf.cf.logging.opentelemetry.agent.ext.config.ExtensionConfigurations.EXPORTER;
+import com.sap.hcf.cf.logging.opentelemetry.agent.ext.config.ExtensionConfigurations.RUNTIME;
 import io.opentelemetry.exporter.otlp.http.metrics.OtlpHttpMetricExporter;
 import io.opentelemetry.exporter.otlp.http.metrics.OtlpHttpMetricExporterBuilder;
 import io.opentelemetry.sdk.autoconfigure.spi.ConfigProperties;
@@ -121,10 +121,10 @@ public MetricExporter createExporter(ConfigProperties config) {
                     "Credential \"" + CRED_DYNATRACE_APIURL + "\" not found. Skipping dynatrace exporter configuration");
             return NoopMetricExporter.getInstance();
         }
-        String tokenName = DEPRECATED.RUNTIME.CLOUD_FOUNDRY.SERVICE.DYNATRACE.TOKEN_NAME_OTEL.getValue(config);
+        String tokenName = RUNTIME.CLOUD_FOUNDRY.SERVICE.DYNATRACE.TOKEN_NAME.getValue(config);
         if (isBlank(tokenName)) {
             LOG.warning(
-                    "Configuration \"" + DEPRECATED.RUNTIME.CLOUD_FOUNDRY.SERVICE.DYNATRACE.TOKEN_NAME_OTEL.getKey() + "\" not found. Skipping dynatrace exporter configuration");
+                    "Configuration \"" + RUNTIME.CLOUD_FOUNDRY.SERVICE.DYNATRACE.TOKEN_NAME.getKey() + "\" not found. Skipping dynatrace exporter configuration");
             return NoopMetricExporter.getInstance();
         }
         String apiToken = credentials.getString(tokenName);