refactor: Use meaningful variable

[liangwen12year]

Enhancement: refractor: Use meaningful variable

Reason: Some variables used in the module code are not meaningful at all, which mgiht be hard to read and understand. Therefore, replace them with meaningful variables.

Result:

Issue Tracker Tickets (Jira or BZ if any):

[codecov[bot]]

Codecov Report

Attention: 18 lines in your changes are missing coverage. Please review.

Comparison is base (11fa80a) 43.31% compared to head (7e7dacf) 43.31%.

Files	Patch %	Lines
library/network_connections.py	23.52%	13 Missing :warning:
module_utils/network_lsr/argument_validator.py	71.42%	4 Missing :warning:
module_utils/network_lsr/utils.py	75.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #654 +/- ## ======================================= Coverage 43.31% 43.31% ======================================= Files 13 13 Lines 3068 3068 Branches 394 394 ======================================= Hits 1329 1329 Misses 1739 1739 ``` | [Flag](https://app.codecov.io/gh/linux-system-roles/network/pull/654/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=linux-system-roles) | Coverage Δ | | |---|---|---| | [sanity](https://app.codecov.io/gh/linux-system-roles/network/pull/654/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=linux-system-roles) | `19.82% <0.00%> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=linux-system-roles#carryforward-flags-in-the-pull-request-comment) to find out more.

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