Create a o.s.d.gemfire.tests.TestException, RuntimeException class.

The TestException indicates a problem during testing.

spring-data-geode-test/src/main/java/org/springframework/data/gemfire/tests/TestException.java

@@ -0,0 +1,41 @@
+/*
+ *  Copyright 2019 the original author or authors.
+ *
+ *  Licensed 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
+ *
+ *       https://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.springframework.data.gemfire.tests;
+
+/**
+ * {@link RuntimeException} used to capture a problem during testing.
+ *
+ * @author John Blum
+ * @see java.lang.RuntimeException
+ * @since 1.0.0
+ */
+@SuppressWarnings("unused")
+public class TestException extends RuntimeException {
+
+	public TestException() { }
+
+	public TestException(String message) {
+		super(message);
+	}
+
+	public TestException(Throwable cause) {
+		super(cause);
+	}
+
+	public TestException(String message, Throwable cause) {
+		super(message, cause);
+	}
+}