Updates the config property by providing list of settings as a NSDictionary Object.
SMPAppSettings* appSettings = [SMPAppSettings initializeWithConnection:clientConn userName:"username" password:@"password"];
NSDictionary props = [NSMutableDictionary dictionary];
[props setValue:"654321" forKey:@"d:ApnsDeviceToken"];
NSError error = nil;
BOOL isSuccess = [appSettings setConfigProperty:props error:&error];
if (!error)
{
// Further processing
}