Added support for loading test properties from a properties file

tests/src/test/java/org/apache/camel/kafkaconnector/AbstractKafkaTest.java

@@ -34,6 +34,8 @@ public class AbstractKafkaTest {
     public static final KafkaConnectService KAFKA_CONNECT_RUNNER_SERVICE;
 
     static {
+        PropertyUtils.load();
+
         KAFKA_SERVICE = KafkaServiceFactory.createService();
 
         KAFKA_SERVICE.initialize();

tests/src/test/java/org/apache/camel/kafkaconnector/PropertyUtils.java

@@ -0,0 +1,64 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.camel.kafkaconnector;
+
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Properties;
+
+import org.junit.Assert;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public final class PropertyUtils {
+    private static final Logger LOG = LoggerFactory.getLogger(PropertyUtils.class);
+
+    private PropertyUtils() {
+
+    }
+
+    public static void load() {
+        String fileName = System.getProperty("test.properties");
+
+        if (fileName == null) {
+            LOG.info("Test properties was not provided, therefore not loading any test properties");
+
+            return;
+        }
+
+        try (InputStream stream = new FileInputStream(fileName)) {
+            Properties properties = new Properties();
+
+            properties.load(stream);
+
+            System.getProperties().putAll(properties);
+        } catch (FileNotFoundException e) {
+            LOG.error("Test properties provided at {} does not exist, therefore aborting the test execution",
+                    fileName);
+
+            Assert.fail("The given test properties file does not exist");
+        } catch (IOException e) {
+            LOG.error("I/O error reading the test properties at {}: {}",
+                    fileName, e.getMessage(), e);
+
+            Assert.fail("Unable to read the test properties file");
+        }
+    }
+}