Print MSSQL* events to stdout

[jelster]

As a user, I want to be able to view SQL-related event log entries without having to docker exec powershell get-winevent or similar.

PR adds display of events (via Get-EventLog) matching the Source filter of MSSQL*. I arbitrarily selected 2s as the refresh interval for logs because I wasn't sure if setting it lower (e.g., 1s) would have negative implications.

[gigatexal]

Does docker logs -f do anything similar?

[jelster]

@gigatexal - docker log only displays what's written to stdout; because the PR change writes event log entries to stdout, running docker log -f with this will display event log entries.

[gigatexal]

That's awesome and a very welcome addition.

[jelster]

Totally! I haven't seen any other samples use this, so I almost feel like there's got to be some catch that I'm not aware of.

[gigatexal]

Let's see if it gets merged. If not I'm sure they'll let us know if you missed something.

[jelster]

This PR could resolve (at least in part) #16

[perrysk-msft]

{Merged PR} Thanks for the contribution @jelster