Task Details:
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    Task ID   : AETHER-2167 : Implement helm charts for deploying prom-label-proxy
    Task Link : https://jira.opennetworking.org/browse/AETHER-2167

Features/Root Cause Analysis :
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    * config model helm chart for prom label proxy
    * prom-label-proxy helm chart
    * getting initial config not done deliberatlywq

Unit Test:
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     * Integration testing with prometheus done
     * Integration testing with Grafana pending

Change-Id: I1b94feee56cb7046dd1affb036c3d02585aedcaf
20 files changed