Add test for last subscribe method
Add test for last subscribe method

masato/meshblu-dev,masato/meshblu,dommert/meshblu,jaambee/meshblu,jaambee/meshblu,masato/meshblu,ChemTics/meshblu,osokay/IotServerCore,ChemTics/meshblu,masato/meshblu-dev,masato/meshblu-dev,masato/meshblu,jaambee/meshblu,dommert/meshblu,dommert/meshblu,octoblu/meshblu,osokay/IotServerCore,osokay/IotServerCore,ChemTics/meshblu,octoblu/meshblu