fix(xo-server/createVm): fix OTHER_OPERATION_IN_PROGRESS

[MathieuRA]

Description

wait for VDIs to be created before updating existing VDIs, otherwise VBD_create may return an error if a VDI is being migrated

may fix zammad#34862
Introduced by 04dd9e9

To reproduce

xo-cli vm.create name_label=foo template=3b1c096b-ba9e-a5c5-74e0-b1c006243f2c VDIs=json:['{"name_label":"test", "size": 10000, "type":"system", "SR":"86a9757d-9c05-9fe0-e79a-8243cb1f37f3"}'] existingDisks=json:'{"0":{"$SR":"87a388a1-c243-1da9-0fc1-63fa62a9b999"}}'

Checklist

• Commit
  • Title follows commit conventions
  • Reference the relevant issue (Fixes #007, See xoa-support#42, See https://...)
  • If bug fix, add Introduced by
• Changelog
  • If visible by XOA users, add changelog entry
  • Update "Packages to release" in CHANGELOG.unreleased.md
• PR
  • If UI changes, add screenshots
  • If not finished or not tested, open as Draft

Review process

This 2-passes review process aims to:

• develop skills of junior reviewers
• limit the workload for senior reviewers
• limit the number of unnecessary changes by the author

1. The author creates a PR.
2. Review process:
   1. The author assigns the junior reviewer.
   2. The junior reviewer conducts their review:
      • Resolves their comments if they are addressed.
      • Adds comments if necessary or approves the PR.
   3. The junior reviewer assigns the senior reviewer.
   4. The senior reviewer conducts their review:
      • If there are no unresolved comments on the PR → merge.
      • Otherwise, we continue with 3.
3. The author responds to comments and/or makes corrections, and we go back to 2.

Notes:

1. The author can request a review at any time, even if the PR is still a Draft.
2. In theory, there should not be more than one reviewer at a time.
3. The author should not make any changes:
   • When a reviewer is assigned.
   • Between the junior and senior reviews.