Update config_manager according to new changes in performance DB (#41)

* Update config_manager according to new changes in performance DB

* Updated field split to use ';' instead of ','

* changes to account for perf DB

* removes columns no longer in issue summary

* Reverts previous 2 commits

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Co-authored-by: CarlosCoelhoSL <ccoelho@scottlogic.com>

Author: feba-rajan