Separate OS status and path
Separate OS status and path

Make _DiagnoseOSStatus only return a status message for the OS diagnose object
and create a new _DiagnoseOSPath function to get the path out. This will let us
be more flexible in the messages we display to the user.

Reviewed-By: imsnah


dimara/ganeti,apyrgio/ganeti,mbakke/ganeti,yiannist/ganeti,apyrgio/snf-ganeti,bitemyapp/ganeti,leshchevds/ganeti,yiannist/ganeti,andir/ganeti,dimara/ganeti,andir/ganeti,grnet/snf-ganeti,apyrgio/ganeti,yiannist/ganeti,grnet/snf-ganeti,leshchevds/ganeti,ganeti-github-testing/ganeti-test-1,mbakke/ganeti,onponomarev/ganeti,bitemyapp/ganeti,ganeti/ganeti,ganeti/ganeti,mbakke/ganeti,apyrgio/snf-ganeti,leshchevds/ganeti,onponomarev/ganeti,ganeti/ganeti,ganeti-github-testing/ganeti-test-1,andir/ganeti