[Bug 1871317] [NEW] When vg insufficient lv:lvol0 will crearte by default

[HYSong]

Public bug reported:

It will create a default LV named lvol0,
when executing 'lvcreate -T -L <lv_size> --poolmetadatasize <pool_metadata_size >' 
and the sum of lv_size and pool_metadata_size larger than vg_size.

I think it no use to create a LV named lvol0 when insufficient error
occurred.

=====================================================================================
$vgs
VG       #PV #LV #SN Attr   VSize VFree
test-vg1   1   0   0 wz--n- 5.00g 5.00g

$lvcreate -T -L 4864m --poolmetadatasize 1024 test-vg1/shy-test-pool1
Volume group "test-vg1" has insufficient free space (1023 extents): 1216 required.

$lvs -a
LV    VG       Attr       LSize Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
lvol0 test-vg1 -wi------- 1.00g

** Affects: lvm2 (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1871317

Title:
  When vg insufficient lv:lvol0 will crearte by default

Status in lvm2 package in Ubuntu:
  New

Bug description:
  It will create a default LV named lvol0,
  when executing 'lvcreate -T -L <lv_size> --poolmetadatasize <pool_metadata_size >' 
  and the sum of lv_size and pool_metadata_size larger than vg_size.

  I think it no use to create a LV named lvol0 when insufficient error
  occurred.

  =====================================================================================
  $vgs
  VG       #PV #LV #SN Attr   VSize VFree
  test-vg1   1   0   0 wz--n- 5.00g 5.00g

  $lvcreate -T -L 4864m --poolmetadatasize 1024 test-vg1/shy-test-pool1
  Volume group "test-vg1" has insufficient free space (1023 extents): 1216 required.

  $lvs -a
  LV    VG       Attr       LSize Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  lvol0 test-vg1 -wi------- 1.00g

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