[SEBA-624] Implementation of radius server operational status

Cherry-picked from aaa-1.10

Change-Id: I3b70ddfc45c4b9e57c587df671088580c7426a89
diff --git a/app/src/main/java/org/opencord/aaa/impl/OsgiPropertyConstants.java b/app/src/main/java/org/opencord/aaa/impl/OsgiPropertyConstants.java
index 38f1a32..1c59799 100644
--- a/app/src/main/java/org/opencord/aaa/impl/OsgiPropertyConstants.java
+++ b/app/src/main/java/org/opencord/aaa/impl/OsgiPropertyConstants.java
@@ -24,6 +24,16 @@
     private OsgiPropertyConstants() {
     }
 
-    public static final String STATISTICS_GENERATION_EVENT = "statisticsGenerationEvent";
-    public static final int STATISTICS_GENERATION_EVENT_DEFAULT = 20;
+    public static final String STATISTICS_GENERATION_PERIOD = "statisticsGenerationPeriodInSeconds";
+    public static final int STATISTICS_GENERATION_PERIOD_DEFAULT = 20;
+
+    public static final String OPERATIONAL_STATUS_SERVER_EVENT_GENERATION =
+            "operationalStatusEventGenerationPeriodInSeconds";
+    public static final int OPERATIONAL_STATUS_SERVER_EVENT_GENERATION_DEFAULT = 30;
+
+    public static final String OPERATIONAL_STATUS_SERVER_TIMEOUT = "operationalStatusServerTimeoutInSeconds";
+    public static final int OPERATIONAL_STATUS_SERVER_TIMEOUT_DEFAULT = 10;
+
+    public static final String STATUS_SERVER_MODE = "operationalStatusEvaluationMode";
+    public static final String STATUS_SERVER_MODE_DEFAULT = "AUTO";
 }