modify response and model architecture
add get function test code
modify ssh unittest code
Merge remote-tracking branch 'upstream/develop' into develop
modify check_ssh function
add put unittest code
modify unittest comment
add start_model return value and modify the unittest code
modify unittest to patch return value correctly
remove unnecessary print in ssh.py
add bacuup_interval
Merge pull request #6 from chenjordan/develop

modify ssh model and add unittest