Fix ineffassign issues

Signing was failing as the builds
were expected to run as ubuntu but
is run as root.

Closes #11686

Make Ldap group composed of  DNs work.

Fix for default permissions on folder are not shown as inherited in it's dashboards

pkg/tsdb: fix ineffassign isues

fix CircleCI gometalinter test

graphite: use a query when testing data source

postgres: adjust timeFilter, timeFrom and timeTo macro examples

Merge branch 'annotations-created' of https://github.com/ryantxu/grafana into ryantxu-annotations-created

removed padding and moved carrot

for some reason the linter lints files in /vendor
which it should not. So we have to remove it until
it works as expected

ref #10381

this makes it possible for the plugin repo
to provide the correct package if arch and os matters

influxdb: Check before assuming first column to be 'time'

Add gometalinter to CircleCI

remove unused variables detected by varcheck