prior to this fix Grafana didnt delete meta data
about the provisioned dashboard in `dashboard_provisioning`
which means that the dashboard wasn't inserted into
Grafana again if the folder was delete within Grafana.
closes#13280
* stackdriver: add resource type to filter and group bys
* stackdriver: remove not used param
* stackdriver: refactor filter and group by code
* stackdriver: remove resource type if its already in filter list
* stackdriver: remove debug logging
* stackdriver: remove more debug logging
* stackdriver: append resource type to legend name if there are more than one type present in the response
* stackdriver: only make new request if filter has real value
* stackdriver: format legend support for resource type
* stackdriver: add resource type to documentation
* stackdriver: not returning promise from query function
* stackdriver: fix refactoring bug
* stackdriver: remove not used import
See,
$ gometalinter --vendor --deadline 10m --disable-all --enable=megacheck ./...
pkg/tsdb/stackdriver/stackdriver.go:171:26⚠️ regular expression does not contain any meta characters (SA6004) (megacheck)
I found this article benchmarking Replace vs Regexp,
https://medium.com/codezillas/golang-replace-vs-regexp-de4e48482f53
See,
$ gometalinter --vendor --deadline 10m --disable-all --enable=megacheck ./...
pkg/tsdb/graphite/graphite.go:167:28⚠️ regular expression does not contain any meta characters (SA6004) (megacheck)
pkg/tsdb/graphite/graphite.go:172:28⚠️ regular expression does not contain any meta characters (SA6004) (megacheck)
See,
$ gometalinter --vendor --deadline 10m --disable-all --enable=megacheck ./...
pkg/login/ldap.go:188:40⚠️ should omit comparison to bool constant, can be simplified to !*extUser.IsGrafanaAdmin (S1002) (megacheck)
$ gometalinter --vendor --deadline 10m --disable-all --enable=megacheck ./...
pkg/services/alerting/reader.go:37:2⚠️ should use for range instead of for { select {} } (S1000) (megacheck)
