Allow iBGP update on both provisioning and active trunks

Updated unit tests accordingly. iBGP update is allowed only on routers with a provisioning or active trunk, not initial or terminated.

requested review from @simone.spinelli

assigned to @karel.vanklink

resolved all threads

added 1 commit

• 9e803fc0 - Update error message

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added 1 commit

• 24c30463 - Update error message in unit test

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added 12 commits

• 24c30463...c4a1af80 - 9 commits from branch develop
• 7517ac4d - Allow iBGP update on both provisioning and active trunks
• f9f1fead - Update error message
• 39e08987 - Update error message in unit test

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enabled an automatic merge when the pipeline for 39e08987 succeeds

merged