Avoid sending WARNINGS if api usage value is zero

@@ -181,7 +181,7 @@ public class TenantApiUsageState {
             long threshold = getProfileThreshold(recordKey);
             long warnThreshold = getProfileWarnThreshold(recordKey);
             ApiUsageStateValue tmpValue;
-            if (threshold == 0 || value < warnThreshold) {
+            if (threshold == 0 || value == 0 || value < warnThreshold) {
                 tmpValue = ApiUsageStateValue.ENABLED;
             } else if (value < threshold) {
                 tmpValue = ApiUsageStateValue.WARNING;