collectd/collectd — pull request #346 by bernd (2013-06-10 13:58:47+00:00)
Title: Unbreak type_inst value in collectd psql view.

There was an error in the `collectd` view where `plugin_inst` was used instead of the correct `type_inst`.

#### Before
```
collectd=# SELECT * FROM collectd LIMIT 2;
host | plugin | plugin_inst | type | type_inst | identifier | tstamp | name | value
---------+--------+-------------+-----------+-----------------------+-------------------------+-------------------------------+------+-------
switch0 | snmp | | if_octets | GigabitEthernet1_0_22 | switch0/snmp/if_octets- | 2013-06-08 16:06:31.625519+02 | 'rx' | 0
switch0 | snmp | | if_octets | GigabitEthernet1_0_22 | switch0/snmp/if_octets- | 2013-06-08 16:06:31.625519+02 | 'tx' | 0
```
#### After
```
collectd=# SELECT * FROM collectd LIMIT 2;
host | plugin | plugin_inst | type | type_inst | identifier | tstamp | name | value
---------+--------+-------------+-----------+-----------------------+----------------------------------------------+-------------------------------+------+-------
switch0 | snmp | | if_octets | GigabitEthernet1_0_22 | switch0/snmp/if_octets-GigabitEthernet1_0_22 | 2013-06-08 16:06:31.625519+02 | 'rx' | 0
switch0 | snmp | | if_octets | GigabitEthernet1_0_22 | switch0/snmp/if_octets-GigabitEthernet1_0_22 | 2013-06-08 16:06:31.625519+02 | 'tx' | 0
```
(look at the `identifier` column)