Dashboard mixes data from different prometheus jobs

[lukaszsamson]

In our setup we have mainnet and testnet validators monitored by one prometheus instance.
Prometheus config includes jobs for testnet and mainnet nodes

  - job_name: 'testnet eth2 validator'
    static_configs:
      - targets: ['redacted']
  - job_name: 'testnet eth2 beacon node'
    static_configs:
      - targets: ['redacted']
  - job_name: 'mainnet eth2 validator'
    static_configs:
      - targets: ['redacted']
  - job_name: 'mainnet eth2 beacon node'
    static_configs:
      - targets: ['redacted']

The dashboards from this repo mix data from mainnet and testnet. Setting dashboard variables validator_job to mainnet eth2 validator and node_job to mainnet eth2 beacon node does not work.