Deprecate spring.cache.hazelcast.config

The additional configuration for an `HazelcastInstance` will be removed
in 2.0. This commit makes sure that the property is deprecated in 1.5

See gh-8470

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/cache/CacheProperties.java

@@ -88,6 +88,7 @@ public class CacheProperties {
 		return this.ehcache;
 	}
 
+	@Deprecated
 	public Hazelcast getHazelcast() {
 		return this.hazelcast;
 	}
@@ -193,6 +194,7 @@ public class CacheProperties {
 	/**
 	 * Hazelcast specific cache properties.
 	 */
+	@Deprecated
 	public static class Hazelcast {
 
 		/**
@@ -200,6 +202,9 @@ public class CacheProperties {
 		 */
 		private Resource config;
 
+		@DeprecatedConfigurationProperty(replacement = "spring.hazelcast.config",
+				reason = "Use general hazelcast auto-configuration instead.")
+		@Deprecated
 		public Resource getConfig() {
 			return this.config;
 		}

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/cache/CacheAutoConfigurationTests.java

@@ -451,6 +451,7 @@ public class CacheAutoConfigurationTests {
 	}
 
 	@Test
+	@Deprecated
 	public void hazelcastCacheWithConfig() throws IOException {
 		load(DefaultCacheConfiguration.class, "spring.cache.type=hazelcast",
 				"spring.cache.hazelcast.config=org/springframework/boot/autoconfigure/cache/hazelcast-specific.xml");
@@ -469,6 +470,7 @@ public class CacheAutoConfigurationTests {
 	}
 
 	@Test
+	@Deprecated
 	public void hazelcastWithWrongConfig() {
 		this.thrown.expect(BeanCreationException.class);
 		this.thrown.expectMessage("foo/bar/unknown.xml");
@@ -505,6 +507,7 @@ public class CacheAutoConfigurationTests {
 	}
 
 	@Test
+	@Deprecated
 	public void hazelcastCacheWithMainHazelcastAutoConfigurationAndSeparateCacheConfig()
 			throws IOException {
 		String mainConfig = "org/springframework/boot/autoconfigure/hazelcast/hazelcast-specific.xml";