WordPressAuthenticator: fix issue with logging in by site address starting version 1.5.3

[jaclync]

I noticed that I wasn't able to test logging in by entering site address since WordPressAuthenticator-iOS version 1.5.3. Something between version 1.5.2 and 1.5.3 seems to make it not work:

CredStore - performQuery - Error copying matching creds.  Error=-50, query={
    "m_Limit" = "m_LimitAll";
    ptcl = htps;
    srvr = "funtestingusa.wpcomstaging.com";
    sync = syna;
}

This issue might be from WCiOS or WordPressAuthenticator or WordPressAuthenticator's dependencies. Let's fix this issue, so that we can upgrade the WordPressAuthenticator pod to the latest!