Create agent job that writes checkmk results into errorlog

[Teutenberg]

Create a agent job to write checkmk procedure results into the errorlog when they raise a warning or critical. This will allow monitoring through log aggregation system like Splunk.

[Teutenberg]

New agent job calls procedures with parameter @writelog = 1. Deploys to instance in a disabled state, if required can be enabled. https://github.com/Teutenberg/DBAid2/blob/master/database/post_script.sql#L473