Trim profile names in array (#469)

* Trim profile names in array.  Fixes #460

* Use tokenizeToStringArray

spring-cloud-context/src/main/java/org/springframework/cloud/bootstrap/config/PropertySourceBootstrapConfiguration.java

@@ -222,7 +222,7 @@ public class PropertySourceBootstrapConfiguration implements
 
 	private String[] getProfilesForValue(Object property) {
 		final String value = (property == null ? null : property.toString());
-		return StringUtils.commaDelimitedListToStringArray(value);
+		return property == null ? new String[0] : StringUtils.tokenizeToStringArray(value, ",");
 	}
 
 }