[xxmazha]

What problem does this PR solve?

This script "pegasus_add_node_list.sh" in "/scripts/" used script "minos_common.sh", In "minos_common.sh", function "minos_bootstrap()" has an error when you are using Minos2 to operate clusters. This PR fixed the error.

What it is now:

When you are using "pegasus_add_node_list.sh" to operate clusters on Minos2：

Set meta level to steady...
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./deploy bootstrap pegasus azmbcloudsrv-security --job replica --task 0
usage: deploy.py [-h] [--version] [-v VERBOSITY] [--remote_user REMOTE_USER]
                 {cleanup,decommission,reprocess,fetch,reconfigure,update_rackinfo,start,convert,stop,restart,show,reload,version_list,shell,pack,check,getconf,rolling_update}
                 ...
deploy.py: error: invalid choice: 'bootstrap' (choose from 'cleanup', 'decommission', 'reprocess', 'fetch', 'reconfigure', 'update_rackinfo', 'start', 'convert', 'stop', 'restart', 'show', 'reload', 'version_list', 'shell', 'pack', 'check', 'getconf', 'rolling_update')

Tests
Manual test (Test on 2 working clusters)