sp_Blitz: revisit priorities 1-50

[BrentOzar]

I'm constantly saying "priorities 1-50 will get you fired," but that isn't really true: there are a few things in there whose priorities we should revisit, like the DAC not being enabled, and I gotta come up with a clear 1-X number range that are really bad offenses.

[BrentOzar]

Checks to change:

• 164 Plan Guides Failing - lower to priority 100
• 77 Database Snapshot Online - lower to priority 170
• 209 DBCC WRITEPAGE Used Recently - raise to priority 10
• 150 Errors Logged Recently in the Default Trace - lower to priority 170
• Remote Admin Connections Disabled - lower to priority 170