INT-3152 Speed Up Build Times

Add a `@Rule` to skip long-runing tests during normal builds.

Add the rule to long-running tests in gemfire, ip, jms, jmx.

Add an environment variable `RUN_LONG_INTEGRATION_TESTS`; when set
to true, all tests are run.

Set the environment variable to true on all nightly builds.

Build now runs in 13 minutes on my 3 year old laptop.

spring-integration-test/src/main/java/org/springframework/integration/test/support/LongRunningIntegrationTest.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2013 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
+ *
+ *      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.springframework.integration.test.support;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.junit.Assume;
+import org.junit.rules.TestWatchman;
+import org.junit.runners.model.FrameworkMethod;
+import org.junit.runners.model.Statement;
+
+/**
+ * Rule to prevent long running tests from running on every build; set environment
+ * variable RUN_LONG_INTEGRATION_TESTS on a CI nightly build to ensure coverage.
+ *
+ * @author Gary Russell
+ * @since 3.0
+ *
+ */
+public class LongRunningIntegrationTest extends TestWatchman {
+
+	private final static Log logger = LogFactory.getLog(LongRunningIntegrationTest.class);
+
+	@Override
+	public Statement apply(Statement base, FrameworkMethod method, Object target) {
+		boolean shouldRun = "true".equalsIgnoreCase(System.getenv("RUN_LONG_INTEGRATION_TESTS"));
+		if (!shouldRun) {
+			logger.info("Skipping long running test " + this.getClass().getSimpleName() + "." + method.getName());
+		}
+		Assume.assumeTrue(shouldRun);
+		return super.apply(base, method, target);
+	}
+
+}