More detail on credentials for discovery

docs/src/main/asciidoc/intro.adoc

@@ -16,5 +16,5 @@ implementation of Spring Cloud Commons `DiscoveryClient` so you can
 `@EnableDiscoveryClient` and provide your credentials as
 `spring.cloud.cloudfoundry.discovery.[email,password]` and then you
 can use the `DiscoveryClient` directly or via a `LoadBalancerClient`
-(also `*.url` if you are not connecting to [Pivotal Web
-Services](https://run.pivotal.io)).
+(also `*.url` if you are not connecting to
+https://run.pivotal.io[Pivotal Web Services]).

docs/src/main/asciidoc/spring-cloud-cloudfoundry.adoc

@@ -9,6 +9,11 @@ the fact that it has to get an access token from Cloud Foundry.
 
 include::quickstart.adoc[]
 
+The `DiscoveryClient` can lists all the apps in a space, according to
+the credentials it is authenticated with, where the space defaults to
+the one the client is running in (if any). If neither org nor space
+are configured, they default per the user's profile in Cloud Foundry.
+
 == Single Sign On
 
 NOTE: All of the OAuth2 SSO and resource server features moved to Spring Boot

spring-cloud-cloudfoundry-discovery/src/main/java/org/springframework/cloud/cloudfoundry/discovery/CloudFoundryDiscoveryClientConfiguration.java

@@ -29,6 +29,7 @@ import org.springframework.boot.context.properties.EnableConfigurationProperties
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.core.env.Environment;
+import org.springframework.util.StringUtils;
 
 /**
  * @author Josh Long
@@ -54,7 +55,7 @@ public class CloudFoundryDiscoveryClientConfiguration {
 	public CloudFoundryClient cloudFoundryClient(CloudCredentials cc)
 			throws MalformedURLException {
 		CloudFoundryClient cloudFoundryClient;
-		if (this.discovery.getOrg() != null && this.discovery.getSpace() != null) {
+		if (StringUtils.hasText(this.discovery.getOrg()) && StringUtils.hasText(this.discovery.getSpace())) {
 			cloudFoundryClient = new CloudFoundryClient(cc,
 					URI.create(this.discovery.getUrl()).toURL(), this.discovery.getOrg(),
 					this.discovery.getSpace());

spring-cloud-cloudfoundry-discovery/src/main/java/org/springframework/cloud/cloudfoundry/discovery/CloudFoundryDiscoveryProperties.java

@@ -16,6 +16,7 @@
 
 package org.springframework.cloud.cloudfoundry.discovery;
 
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.boot.context.properties.ConfigurationProperties;
 
 /**
@@ -47,6 +48,7 @@ public class CloudFoundryDiscoveryProperties {
 	/**
 	 * Space name to authenticate with (default to user's default).
 	 */
+	@Value("${vcap.application.space_name:}")
 	private String space;
 
 	/**