#293 Restore the behavior of adding COMMIT and BUILD stages to pipeline

[VivekBuzruk]

Affects: <hygieia-core-version-number>.

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Overwrite with earlier commit + make few changes for Commit.

Pipeline is at the junction of Team and Product, so one need not iterate across ProductCIs, but navigate appropriately through aligned TeamDashboards while associating Stages with Pipeline.

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[rvema]

@VivekBuzruk please sign the CLA and we will accept the change

[VivekBuzruk]

CLA Signed, but still showing pending

[chzhanpeng]

Hi, the previous PR was to fix an NPE, reverting the changes may bring back the NPE which we want to avoid.
You mentioned you added a few additional changes for Commit, but I'm not seeing those. Can you verify?

[VivekBuzruk]

NPE (Null Pointer Exception) in Unit Test?? I also modified CommitEventListenerTest which now maps to find a collectorItem.

Btw. prior to #192, CommitEventListener has a loop "for (CollectorItem SCM : SCMs) ". I do not think this is required (rather it may result wrong mapping if there are multiple SCMs).