[UI] Batch volume creation

[ChengYanJin]

Component: ui, volumes

Context:
We want to be able to batch create volume from UI.

Summary:
Note that:
For RawBlockDevice, the recommended path only happens with '/dev/vda', we will see later if
For SparseLoopDevice, the size of the batch volume are the same as the default one.

Acceptance criteria:

1. The Default Volume Creation Form
   

2. Volume type RawBlockDevice batch creation
   

3. Volume type SparseLoopDevice batch creation. (From big HD screen)
   

---

Closes: #2964

[bert-e]

Hello chengyanjin,

My role is to assist you with the merge of this
pull request. Please type @bert-e help to get information
on this process, or consult the user documentation.

Status report is not available.

[bert-e]

Conflict

There is a conflict between your branch improvement/2964-batch-volume-creation and the
destination branch development/2.6.

Please resolve the conflict on the feature branch (improvement/2964-batch-volume-creation).

 $ git fetch
 $ git checkout origin/improvement/2964-batch-volume-creation
 $ git merge origin/development/2.6
 $ # <intense conflict resolution>
 $ git commit
 $ git push origin HEAD:improvement/2964-batch-volume-creation

[bert-e]

Integration data created

I have created the integration data for the additional destination branches.

• this pull request will merge improvement/2964-batch-volume-creation into
  development/2.6
• w/2.7/improvement/2964-batch-volume-creation will be merged into development/2.7

The following branches will NOT be impacted:

• development/1.0
• development/1.1
• development/1.2
• development/1.3
• development/2.0
• development/2.1
• development/2.2
• development/2.3
• development/2.4
• development/2.5

You can set option create_pull_requests if you need me to create
integration pull requests in addition to integration branches, with:

@bert-e create_pull_requests

[bert-e]

Waiting for approval

The following approvals are needed before I can proceed with the merge:

• the author

• one peer

Peer approvals must include at least 1 approval from the following list:

• @jbertran

• @ChengYanJin

• @slaperche-scality

• @thomasdanan

• @lucieleonard

• @gdemonet

• @TeddyAndrieux

• @nootal

• @MonPote

• @tcarmet

• @sayf-eddine-scality

• @cmonfort

• @NicolasT

• @carlito-scality

• @alexandre-allard-scality

[ChengYanJin]

Wrong target, will create a new PR.