Focus fails to connect when other SASL Mechs are offered by Openfire

[speedy01]

I'm using GSSAPI and PLAIN. focus fails to connect with invalid username/password. If GSSAPI is disabled, the focus user connects as expected. It appears that focus is trying to connected using GSSAPI.
To work around this, I have added SASLAuthentication.supportSASLMechanism("PLAIN"); to the connConfig within src/main/java/org/jitsi/impl/protocol/xmpp/XmppProtocolProvider.java

I'm unsure if this is the best way to work around this issue. It maybe better to use blacklist/unsupported, but I'll leave that up to the experts.