Various CI adjustments

[sgarg00]

• Address warnings related to the use of the def keyword: Example- Did you forget the def keyword? WorkflowScript seems to be setting a field named AMF (to a value of type Integer) which could lead to memory leaks or other issues.

• Replace pullFromSelfix and other variables/functions containing Selfix with more generic names.

• Update the common-ci submodule to include Various CI adjustments oai-cn5g-common-ci#3, including the CLA checks.

• Fix existing bugs and improve logging and undeployment handling.

• Reduce repetitive commands by reusing existing helper functions wherever possible.

• Check filters for Ethernet PDU session; Logs are too big: example

• If possible, split Robot tests into separate Jenkins stages. For example, instead of running all tests in a single stage as shown here, use separate stages such as:

  • Stage 1: Test.All NFs
  • Stage 2: Test.eBPF Tests
  • Stage 3: Test.QoS Tests
  • ...

• Fix the PR comment error when replaying a pipeline:

Below error happened when replaying a PR pipeline:

Error when executing success post condition:
Also:   org.jenkinsci.plugins.workflow.actions.ErrorAction$ErrorId: fafbd746-b68a-4ada-a292-e413816f9eea
hudson.AbortException: Can't get cause from run/build

On script console:

OAI-CN5G-FED #169
   org.jenkinsci.plugins.github.pullrequest.GitHubPRCause
      GitHub PR #10: Commit changed
   GitHubPRCause present : true

OAI-CN5G-FED #170
   hudson.model.Cause$UserIdCause
      Started by user Sagar Arora
   org.jenkinsci.plugins.workflow.cps.replay.ReplayCause
      Replayed #169
   GitHubPRCause present : false

Result: [OAI-CN5G-FED #169, OAI-CN5G-FED #170]

githubPRComment → GitHubPRCause is for identifying a PR-triggered build. The thing to watch is that a Replay/manual build may not retain that cause, even though the build is still logically associated with a PR.
Maybe add it in try-catch block or check other workarounds.