[esri:video] Rename extractor

youtube_dl/extractor/__init__.py

@@ -695,7 +695,7 @@ from .vice import ViceIE
 from .viddler import ViddlerIE
 from .videobam import VideoBamIE
 from .videodetective import VideoDetectiveIE
-from .videoesri import VideoEsriIE
+from .esri import EsriVideoIE
 from .videolecturesnet import VideoLecturesNetIE
 from .videofyme import VideofyMeIE
 from .videomega import VideoMegaIE