Restart xl2tpd service when the VPN configuration is modified

[vishesh92]

Description

Fixes #12195

Types of changes

• Breaking change (fix or feature that would cause existing functionality to change)
• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Enhancement (improves an existing feature and functionality)
• Cleanup (Code refactoring and cleanup, that may add test cases)
• Build/CI
• Test (unit or integration test code)

Feature/Enhancement Scale or Bug Severity

Feature/Enhancement Scale

• Major
• Minor

Bug Severity

• BLOCKER
• Critical
• Major
• Minor
• Trivial

Screenshots (if appropriate):

How Has This Been Tested?

How did you try to break this feature and the system with this change?

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[vishesh92]

@blueorangutan package

[blueorangutan]

@vishesh92 a [SL] Jenkins job has been kicked to build packages. It will be bundled with KVM, XenServer and VMware SystemVM templates. I'll keep you posted as I make progress.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 17.59%. Comparing base (b8ed34e) to head (af1a47b).

Additional details and impacted files

@@            Coverage Diff            @@
##               4.22   #12422   +/-   ##
=========================================
  Coverage     17.59%   17.59%           
+ Complexity    15600    15599    -1     
=========================================
  Files          5910     5910           
  Lines        529755   529755           
  Branches      64724    64724           
=========================================
  Hits          93228    93228           
  Misses       426035   426035           
  Partials      10492    10492           

Flag	Coverage Δ
uitests	3.60% <ø> (ø)
unittests	18.66% <ø> (ø)

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[blueorangutan]

Packaging result [SF]: ✔️ el8 ✔️ el9 ✔️ el10 ✔️ debian ✔️ suse15. SL-JID 16356

[blueorangutan]

[LL] Trillian Build Failed (tid-7166)