fix(webdriver): bump selenium to 2.45.0

Bump the selenium standalone binary to 2.45.0.
Note that SL does not yet support 2.45.0 so no changes there.

See https://code.google.com/p/selenium/source/browse/java/CHANGELOG
for a full list of changes to the selenium server.

Closes #1734

Author: juliemr

config.json

@@ -1,7 +1,7 @@
 {
   "webdriverVersions": {
-    "selenium": "2.44.0",
+    "selenium": "2.45.0",
     "chromedriver": "2.14",
-    "iedriver": "2.44.0"
+    "iedriver": "2.45.0"
   }
 }