@Override
  public int getRejectedSessions() {
    return rejectedSessions.get();
  }
This method was taken from StandardManager to set the default maxInactiveInterval based on the
container (to 30 minutes).
<p>
Set the Container with which this Manager has been associated. If it is a Context (the usual
case), listen for changes to the session timeout property.

@param container The associated Container
extensions/geode-modules/src/main/java/org/apache/geode/modules/session/catalina/DeltaSessionManager.java