Add duration_seconds to list of profile properties (#2812)

Co-authored-by: Matthew Miller <[email protected]>

Author: abrooksv

.changes/next-release/feature-AWSSDKforJavav2-7936e4e.json

@@ -0,0 +1,6 @@
+{
+    "type": "feature",
+    "category": "AWS SDK for Java v2",
+    "contributor": "abrooksv",
+    "description": "Added the profile key `duration_seconds` to class `ProfileProperty`"
+}

core/profiles/src/main/java/software/amazon/awssdk/profiles/ProfileProperty.java

@@ -49,6 +49,11 @@ public final class ProfileProperty {
      */
     public static final String ROLE_SESSION_NAME = "role_session_name";
 
+    /**
+     * Property name for specifying how long in seconds to assume the role
+     */
+    public static final String DURATION_SECONDS = "duration_seconds";
+
     /**
      * Property name for specifying the IAM role external id
      */