Remove `DisableVerification` on `RockContext`

[JasonBock]

Describe the solution you'd like
I think I over-though the DisableVerification parameter to RockContext. If I change Dispose() to this:

public void Dispose()
{
    ObjectDisposedException.ThrowIf(this.isDisposed, this);

    if (!this.createdExpectations.Any(_ => _.WasExceptionThrown))
    {
        foreach (var createdExpectations in this.createdExpectations)
        {
            createdExpectations.Verify();
        }
    }

    this.isDisposed = true;
}

This would require WasExceptionThrown to be public, at least the getter - the setter should stay protected. Probably want to do the same thing for WasInstanceInvoked.

Then the constructor on RockContext can be removed. This will be a breaking change, which is why I'm including it with the 10.0.0 release.

[JasonBock]

As a side-thought, this will only show verification exceptions for the first one in the expectation list. It may be nice to combine all of the failures from Verify() calls into one within RockContext.