Low: pgsql: fix grep failure when using pacemaker 1.0.13

The specification of crm_mon on Pacemaker 1.0.13 is changed as below.

On 1.0.12
```
# crm_mon -n1 | grep Master
        pgsql:0 (ocf::heartbeat:pgsql) Master
```

On 1.0.13 
```
# crm_mon -n1 | grep Master
        pgsql:0 (ocf::heartbeat:pgsql): Master
```
colon is added after ")"