return full metric names with tags

[replay]

When calling /metrics/tags/findSeries the returned results should be the full metric names including tags.

mst@mst-nb1:~$ curl -s 'http://localhost:6060/metrics/tags/findSeries' -H 'X-Org-Id: 1'  -X POST -H 'Content-Type: application/json' -d '{"expr":["name=~.+metric.[0-9]$"]}' | jq '.'
[
  "some.id.of.a.metric.4;metric=some.id.of.a.metric;name=some.id.of.a.metric.4;some=tag",
  "some.id.of.a.metric.5;metric=some.id.of.a.metric;name=some.id.of.a.metric.5;some=tag",
  "some.id.of.a.metric.3;metric=some.id.of.a.metric;name=some.id.of.a.metric.3;some=tag",
  "some.id.of.a.metric.9;metric=some.id.of.a.metric;name=some.id.of.a.metric.9;some=tag",
  "some.id.of.a.metric.8;metric=some.id.of.a.metric;name=some.id.of.a.metric.8;some=tag",
  "some.id.of.a.metric.1;metric=some.id.of.a.metric;name=some.id.of.a.metric.1;some=tag",
  "some.id.of.a.metric.7;metric=some.id.of.a.metric;name=some.id.of.a.metric.7;some=tag",
  "some.id.of.a.metric.6;metric=some.id.of.a.metric;name=some.id.of.a.metric.6;some=tag",
  "some.id.of.a.metric.2;metric=some.id.of.a.metric;name=some.id.of.a.metric.2;some=tag"
]

[Dieterbe]

this looks good for perf 👍

[Dieterbe]

lgtm

[DanCech]

Looks good, just fix the gofmt error

[replay]

@DanCech fixed now