[bs-93] Add /info endpoint with git properties etc.

* If git.properties is on the classpath (e.g. from the Maven plugin)
/info will list the commit id, branch and dates.
* If application.yml has an info object at the top level that will
be diplayed as well (so e.g. you can use Maven resource filtering
top add the project name, version etc.)
* RelaxedDataBinder can now be used to bind to a Map (as opposed to
a nested Map inside teh target bean)

[Fixes #49130073]

spring-bootstrap/src/test/java/org/springframework/bootstrap/bind/RelaxedDataBinderTests.java

@@ -17,6 +17,7 @@ import java.lang.annotation.Documented;
 import java.lang.annotation.ElementType;
 import java.lang.annotation.Retention;
 import java.lang.annotation.Target;
+import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
@@ -181,6 +182,26 @@ public class RelaxedDataBinderTests {
 		assertEquals(123, target.getValue());
 	}
 
+	@Test
+	public void testBindMap() throws Exception {
+		Map<String, Object> target = new LinkedHashMap<String, Object>();
+		BindingResult result = bind(target, "spam: bar\n" + "vanilla.value: 123",
+				"vanilla");
+		assertEquals(0, result.getErrorCount());
+		assertEquals("123", target.get("value"));
+	}
+
+	@Test
+	public void testBindMapNestedInMap() throws Exception {
+		Map<String, Object> target = new LinkedHashMap<String, Object>();
+		BindingResult result = bind(target, "spam: bar\n" + "vanilla.foo.value: 123",
+				"vanilla");
+		assertEquals(0, result.getErrorCount());
+		@SuppressWarnings("unchecked")
+		Map<String, Object> map = (Map<String, Object>) target.get("foo");
+		assertEquals("123", map.get("value"));
+	}
+
 	private BindingResult bind(Object target, String values) throws Exception {
 		return bind(target, values, null);
 	}