Fix check_hostname bug

Signed-off-by: apporc <appleorchard2000@gmail.com>
move ntpd to network

Signed-off-by: apporc <appleorchard2000@gmail.com>
Don't force hostname change

Signed-off-by: apporc <appleorchard2000@gmail.com>
Save answer file using shutil.copyfile

Signed-off-by: apporc <appleorchard2000@gmail.com>
integrate code about systemctl in service_operate func

Signed-off-by: apporc <appleorchard2000@gmail.com>
Use answer file saved before instead of generating a new one

Signed-off-by: apporc <appleorchard2000@gmail.com>
Get the exit status of packstack deployment

Signed-off-by: apporc <appleorchard2000@gmail.com>