Addressed inconsistency between RFE-DMDc and GA-DMDc

[alfoa]

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Pull Request Description

What issue does this change request address? (Use "#" before the issue to link it, i.e., #42.)

Closes #2230

What are the significant changes in functionality due to this change request?

Extraction of PR #2224:

•   Identified the reason to have inconsistent score between RFE-DMDc and GA-DMDc.
•   The avgArray and stdArray need to be calculated for each realization. That's the reason of inconsistency.

No new test is added since the inconsistency does not modify the search pattern of the algorithm

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For Change Control Board: Change Request Review

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[moosebuild]

Job Test Ubuntu 18 PIP on 6d49205 : invalidated by @alfoa

[wangcj05]

checklist is good.