Change HvdcBuilder variable access level

[Lisrte]

Please check if the PR fulfills these requirements

• [x] The commit message follows our guidelines
• [ ] Tests for the changes have been added (for bug fixes / features)
• [ ] Docs have been added / updated (for bug fixes / features)

Does this PR already have an issue describing the problem?

No

What kind of change does this PR introduce?

Feature

What is the current behavior?

What is the new behavior (if this is a feature change)? Change AbstractHvdcBuilder varNameHandler and DEFAULT_DANGLING_SIDE access level to protected

Does this PR introduce a breaking change or deprecate an API?

• [ ] Yes
• [x] No

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud