SHIRO-415: updated isLoginAttempt(String authzHeader) to use English Locale.

git-svn-id: https://svn.apache.org/repos/asf/shiro/trunk@1442306 13f79535-47bb-0310-9956-ffa450edef68
SHIRO-412: fixed static method import order (PowerMock replay methods were being trumped by EasyMock's)

git-svn-id: https://svn.apache.org/repos/asf/shiro/trunk@1442317 13f79535-47bb-0310-9956-ffa450edef68