Allows /configprops endpoint to show nested properties

Including maps and lists. Beans with no metadata (in
/META-INF/*spring-configuration-metadata.json) are just serialized
as they come (so might have problems like cycles). Serialization
errors are caught and rendered as an "error" for that bean. Any
problems can be fixed by preparing metadata and specifying which
properties are to be rendered that way.

Fixes gh-1746, fixes gh-1921

.gitignore

@@ -9,6 +9,7 @@
 .project
 .settings
 .metadata
+.factorypath
 bin
 build
 lib/
@@ -28,4 +29,5 @@ overridedb.*
 *.ipr
 *.iws
 .idea
-*.jar
\ No newline at end of file
+*.jar
+.DS_Store

spring-boot-actuator/src/test/resources/META-INF/test-spring-configuration-metadata.json

+{"properties": [
+  {
+    "name": "bar.name",
+    "dataType": "java.lang.String"
+  },
+  {
+    "name": "spam.map.name",
+    "dataType": "java.lang.String"
+  }  ]}
+

spring-boot-samples/spring-boot-sample-actuator/src/test/java/sample/actuator/SampleActuatorApplicationTests.java

@@ -221,6 +221,18 @@ public class SampleActuatorApplicationTests {
 				((String) body.get("context")).startsWith("application"));
 	}
 
+	@Test
+	public void testConfigProps() throws Exception {
+		@SuppressWarnings("rawtypes")
+		ResponseEntity<Map> entity = new TestRestTemplate("user", getPassword())
+				.getForEntity("http://localhost:" + this.port + "/configprops", Map.class);
+		assertEquals(HttpStatus.OK, entity.getStatusCode());
+		@SuppressWarnings("unchecked")
+		Map<String, Object> body = entity.getBody();
+		assertTrue("Wrong body: " + body,
+				body.containsKey("spring.datasource.CONFIGURATION_PROPERTIES"));
+	}
+
 	private String getPassword() {
 		return this.security.getUser().getPassword();
 	}

spring-boot-starters/spring-boot-starter-parent/pom.xml

@@ -17,7 +17,7 @@
 		<url>http://www.spring.io</url>
 	</organization>
 	<properties>
-		<java.version>1.6</java.version>
+		<java.version>1.7</java.version>
 		<resource.delimiter>@</resource.delimiter> <!-- delimiter that doesn't clash with Spring ${} placeholders -->
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>