[v1.0.0-beta2] Setting [[graphite]] templates via ENV variable doesn't work

### Bug report

**Steps to reproduce:**

```
$ export INFLUXDB_GRAPHITE_0_ENABLED=true
$ export INFLUXDB_GRAPHITE_0_BIND_ADDRESS=":2010"
$ export INFLUXDB_GRAPHITE_0_DATABASE="graphiteTest"

$ export INFLUXDB_GRAPHITE_0_TEMPLATES='["jmeter.test.*.* app..measurement.field"]'
OR
$ export INFLUXDB_GRAPHITE_0_TEMPLATES_0="jmeter.test.*.* app..measurement.field"
OR
$ export INFLUXDB_GRAPHITE_0_TEMPLATES="jmeter.test.*.* app..measurement.field"
OR
$ export INFLUXDB_GRAPHITE_0_TEMPLATES_0='["jmeter.test.*.* app..measurement.field"]'

$ service influxdb start
$ echo "jmeter.test.a.max 23 `date +%s`" | nc -vvv localhost 2010
$ influx
> use graphiteTest
> show measurements
name: measurements
------------------
name
jmeter.test.a.max
```

**Expected behavior:** [What you expected to happen]

Measurement parses properly

**Actual behavior:** [What actually happened]

It failed to

Reproduce the issue with the listed INFLUXDB_GRAPHITE_0_* environment variables, the graphite listener on port 2010, and the netcat metric, then inspect linked pull requests 27312 and 27360. Done means the configured template is loaded from the environment and the incoming measurement is parsed into the expected measurement, rather than remaining jmeter.test.a.max.

Written by the indexing model from the issue text.