Changed the MovieDbContext initializer to base("Movies") rather than "MovieDbContext"

It was required for the tests, but not sure why it only made a difference
there. Here's a one way latenight chat I had with tilson, for context
later

(12:21:21 AM) tankorsmash@gmail.com/removed: yo so remember that phantom db that's getting created? MovieDbContext alongside Movies?
(12:21:45 AM) tankorsmash@gmail.com/removed: can you find somewhere in your files that that connection string might be set, or why it's the case?
(12:22:19 AM) tankorsmash@gmail.com/removed: in MoviesController, the MovieDbContext() class is using a conn. string pointing at Movies DB like normal
(12:22:45 AM) tankorsmash@gmail.com/removed: but in TestMoviesController, the MovieDbContext() object is using a conn. string poitning at MovieDbContext db
(12:22:49 AM) tankorsmash@gmail.com/removed: so it's getting made there
(12:22:59 AM) tankorsmash@gmail.com/removed: but I don't understand why
(12:23:22 AM) tankorsmash@gmail.com/removed: why the MovieDbContext db is being created, since I don't know why it works everywhere else but there
(12:25:26 AM) tankorsmash@gmail.com/removed: whelp, I think I found it
(12:26:04 AM) tankorsmash@gmail.com/removed: in Movies.cs we're telling MovieDbContext to  `base("MovieDbContext")` and changed that to `base("Movies")` and now the tests work
(12:26:31 AM) tankorsmash@gmail.com/removed: absolutely no idea why that works, because you'd think that both instances of MovieDbContext would be affected