Log Message:
grafana: update to 6.7.3

Highlights from 6.7:
  Dashboard: Enforce minimum refresh interval
  Data source: Google Sheets data source
  Explore: Query history
  Authorization: Azure OAuth
  Stackdriver: Project Selector

Highlights from 6.6:
  Panels: New stat panel
  Panels: Auto min/max for Bar Gauge/Gauge/Stat
  Panels: News panel
  Panels: Custom data units
  Panels: Bar Gauge unfilled option
  TimePicker: New design & features
  Alerting enhancements
  Explore: Added log message line wrapping options for logs
  Explore: Column with unique log labels
  Explore: Context tooltip
  Explore: Added ability to specify step with Prometheus queries
  Graphite: Added Metrictank dashboard to Graphite datasource
  Loki: Support for template variable queries
  Postgres/MySQL/MSSQL: Added support for region annotations
  Security: Added disabled option for cookie samesite attribute
  TablePanel, GraphPanel: Exclude hidden columns from CSV
  Stackdriver: Meta labels
  CloudWatch: Calculate period based on time range
  CloudWatch: Display partial result in graph when max DP/call limit is reached

Highlights from 6.5:
  Docker: Ubuntu-based images and more
  CloudWatch: Major rewrite and lots of enhancements
  Templating: Dynamic typeahead queries using $__searchFilter
  Graphite: Support for additional Metrictank functionality
  Explore: New log row details view
  Explore: Turn parts of log message into a link using derived fields
  Explore: Time-sync of split views
  Explore: Hover/tooltip support in graphs
  Azure Monitor: Alerting support for Azure Application Insights
  Provisioning: Allow saving of provisioned dashboards from UI
  Auth Proxy: Mix auth proxy with Grafana login token and session cookie
  OAuth: Generic OAuth now supports role mapping
  Image Rendering: Quick update since Grafana 6.4

Highlights of 6.4:
  Explore: Go back to dashboard (with query changes)
  Explore: Live tailing improvements
  Loki: Show logs as annotations in dashboard graphs
  Loki: Use Loki in dashboard panels
  Panels: New logs panel
  Panels: Data links improvements
  Graph: Series override to turn constant (point) into a line
  Dashboard: Share query results between panels
  Plugins: Alpha version of grafana-toolkit
  Image Rendering: PhantomJS deprecation
  Docker: Alpine based docker image
  LDAP: Debug UI