Bug 1103196 - Remove non-conformant acceptSslCerts capability; r=automatedtester

`acceptSslCerts` has been replaced by `acceptInsecureCerts`.

MozReview-Commit-ID: 79KbRoQb1dW

--HG--
extra : rebase_source : 1c0e4fcb468d5c196351cb21715804c98b5fef02

testing/marionette/driver.js

@@ -155,7 +155,6 @@ this.GeckoDriver = function(appName, server) {
     // supported features
     "raisesAccessibilityExceptions": false,
     "rotatable": this.appName == "B2G",
-    "acceptSslCerts": false,
     "proxy": {},
 
     // proprietary extensions