Fix client certificate property

Use correct property name.

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/binding/CaasBindingPropertiesSupplier.java

@@ -89,7 +89,7 @@ public Map<String, String> get() {
                 File clientKeyFile = pemFileCreator.writeFile("caas-client-key-", ".key", clientKey);
 
                 properties.put("otel.exporter.otlp.certificate", serverCertFile.getAbsolutePath());
-                properties.put("otel.exporter.otlp.client.cert", clientCertFile.getAbsolutePath());
+                properties.put("otel.exporter.otlp.client.certificate", clientCertFile.getAbsolutePath());
                 properties.put("otel.exporter.otlp.client.key", clientKeyFile.getAbsolutePath());
 
             } catch (IOException e) {

cf-java-logging-support-opentelemetry-agent-extension/src/test/java/com/sap/hcf/cf/logging/opentelemetry/agent/ext/binding/CaasBindingPropertiesSupplierTest.java

@@ -188,7 +188,7 @@ void shouldReturnFullPropertiesWithTlsConfiguration() throws IOException {
                           .containsEntry("otel.exporter.otlp.protocol", "http/protobuf")
                           .containsEntry("otel.exporter.otlp.compression", "gzip")
                           .containsEntry("otel.exporter.otlp.certificate", "/tmp/server.crt")
-                          .containsEntry("otel.exporter.otlp.client.cert", "/tmp/client.crt")
+                          .containsEntry("otel.exporter.otlp.client.certificate", "/tmp/client.crt")
                           .containsEntry("otel.exporter.otlp.client.key", "/tmp/client.key");
     }