Merge pull request #119 from robertchoi8099/master

make the plugin script work
auto_version to 2.1.39
Revert "UCLOUDNG-1486 Apply new polices for Nova API"

This reverts commit 73e72a82ef9d32f8915e43a2e1076a5283fbd9c5.
add evacuation handler to the vm_port check
improve vm_port_status plugin