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kubernetes/pkg
Kubernetes Submit Queue 855f3e78e8 Merge pull request #50688 from allencloud/refactor-code-in-volume-iscsi
Automatic merge from submit-queue (batch tested with PRs 49861, 50933, 51380, 50688, 51305)

refactor codes in volume iscsi to improve readability

Signed-off-by: allencloud <allen.sun@daocloud.io>



**What this PR does / why we need it**:
This PR refactors some codes in pkg/volume/iscsi. What is specific, this PR takes advantage of return fast to make codes indent less. As a result the readability of codes will improve a little bit.

What I did:
1.  refactor codes in volume iscsi to improve readability.
2.  change a keyword of `delete` into `deleteArgs` to reduce ambiguousness.
3.  make some variables camel case. 

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
NONE

**Special notes for your reviewer**:
NONE

**Release note**:

```release-note
NONE
```
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