add version to test() and test-of() virtual Provides

I discovered in bug 1055821 that these virtual Provides should be
versioned. It's a bit late now (since this is only really helpful if
every task in Beaker has correctly versioned Provides) but this might
come in handy later down the track one day.

Change-Id: I11176470a31475606de9c0f289d928c9a55f0a9c
Merge "add version to test() and test-of() virtual Provides"