Returning all Override Bits at once for FF >= 19

According to last code changes [1] ([2], [3], [4]) at firefox we could return all bits at once - returned bits are negatived and bitwise and-ed so:

remaining_display_errors -= overrideBits;

is replaced by:

remaining_display_errors &= ~overrideBits;

[1] https://bugzilla.mozilla.org/show_bug.cgi?id=785259
[2] https://github.com/mozilla/mozilla-central/commit/453afd5aff7401b7b81d0f1626e2e34a4373d46a
[3] https://github.com/mozilla/mozilla-central/commit/74625a441f973ce886a9e9b9bd5c21f563238bcc
[4] https://github.com/mozilla/mozilla-central/blob/master/security/manager/ssl/src/SSLServerCertVerification.cpp#L350

Fixes partially an issue #3278.
Update TakesScreenshot test to cover chrome.

* add ignores to tests for chrome
* Add TakesScreenshot interface to TestChromeDriver
* add @Rule TestName at JUnit4TestBase for getting current test method name