Werk #10997: mk_postgres: Fixed query "Last vaccum"

Component	Checks & agents
Title	mk_postgres: Fixed query "Last vaccum"
Date	Jun 15, 2020
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.0.0i1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.6.0p14 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.5.0p25 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

The query take the access time from a wrong instance. This may lead to wrong service results. Please install the newest agent plugin {{mk_postgres}} in order to get the right agent output.

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