Dasboard rename

[Sanjay1611]

Signed-off-by: Sanjay Nathani sanjay.nathani@mayadata.io

In this PR following changes take place

• renaming dashboards -
  • /cStor/Overview dashboard -> /cStor/Overview
  • /cStor/Pool dashboard -> /cStor/Pool
  • /cStor/Volume Replicas dashboard -> /cStor/Volume Replica
  • /cStor/Volumes dashboard -> /cStor/Volume
  • /Jiva/Volumes dashboard -> /Jiva/Volume
• adding OpenEBS tag to /cStor/Overview
• upgrading kube-prometheus stack version to 16.5.*
• adding cStor and Jiva tags to the corresponding dashboards