I don’t know a lot, but I do know that alien movies and military flicks are usually nothing short of awesome, so how a movie that is heavy on both, with a meaty middle of explosions and bullets to boot, turns out so painstakingly dull, lifeless and downright boring has got me scratching my head and shaking my fist. Curse you Battle: Los Angeles! You were supposed to be my unofficial cinema start of summer, but now you’re nothing more …