Added some hacks to ensure lv creating success

* added vgremove right before vgcreate

* inserted udevadm settle before vgremove and vgcreate.
  this is for avoiding udev race when there are
  unhandled events in udev queue

Closes-Bug: 1373435
Change-Id: Ic764bb1722ac45b432fc7c476f6e418a3715ac8a
Merge "Added some hacks to ensure lv creating success"