vagrantfile: remove disk path of OSD nodes

osd node's disks will remain on vagrant host,when run "vagrant destroy",
because we use time as a part of disk path, and time on delete not equal time on create.

we already use random_hostname in Libvirt backend,it will create disk
use the hostname as a part of diskname. for example: vagrant_osd2_1539159988_065f15e3e1fa6ceb0770-hda.qcow2.

Signed-off-by: binhong.hua <binhong.hua@gmail.com>

Vagrantfile

@@ -2,7 +2,6 @@
 # vi: set ft=ruby :
 
 require 'yaml'
-require 'time'
 VAGRANTFILE_API_VERSION = '2'
 
 config_file=File.expand_path(File.join(File.dirname(__FILE__), 'vagrant_variables.yml'))
@@ -33,7 +32,6 @@ DEBUG           = settings['debug']
 
 ASSIGN_STATIC_IP = !(BOX == 'openstack' or BOX == 'linode')
 DISABLE_SYNCED_FOLDER = settings.fetch('vagrant_disable_synced_folder', false)
-DISK_UUID = Time.now.utc.to_i
 
 
 ansible_provision = proc do |ansible|
@@ -516,7 +514,7 @@ Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
         # always make /dev/sd{a/b/c} so that CI can ensure that
         # virtualbox and libvirt will have the same devices to use for OSDs
         (0..2).each do |d|
-          lv.storage :file, :device => "hd#{driverletters[d]}", :path => "disk-#{i}-#{d}-#{DISK_UUID}.disk", :size => '50G', :bus => "ide"
+          lv.storage :file, :device => "hd#{driverletters[d]}", :size => '50G', :bus => "ide"
         end
         lv.memory = MEMORY
         lv.random_hostname = true