SSHJ FIPS support

Hi,

When Linux system is FIPS enabled, while connecting using sshj client, getting NPE. When FIPS is disabled, we can successfully establish ssh connection. Please suggest.

2021-02-24 14:27:34,672 INFO [net.schmizz.sshj.transport.TransportImpl] (default task-7) Client identity string: SSH-2.0-SSHJ_0.27.0
2021-02-24 14:27:34,773 INFO [net.schmizz.sshj.transport.TransportImpl] (default task-7) Server identity string: SSH-2.0-OpenSSH_7.4
2021-02-24 14:27:34,829 ERROR [net.schmizz.sshj.transport.TransportImpl] (reader) Dying because - null: java.lang.NullPointerException
at net.schmizz.sshj.transport.kex.AbstractDHGex.parseGexReply(AbstractDHGex.java:89)
at net.schmizz.sshj.transport.kex.AbstractDHGex.next(AbstractDHGex.java:58)
at net.schmizz.sshj.transport.KeyExchanger.handle(KeyExchanger.java:364)
at net.schmizz.sshj.transport.TransportImpl.handle(TransportImpl.java:503)
at net.schmizz.sshj.transport.Decoder.decodeMte(Decoder.java:159)
at net.schmizz.sshj.transport.Decoder.decode(Decoder.java:79)
at net.schmizz.sshj.transport.Decoder.received(Decoder.java:231)
at net.schmizz.sshj.transport.Reader.run(Reader.java:59)
2021-02-24 14:27:34,830 INFO [net.schmizz.sshj.transport.TransportImpl] (reader) Disconnected - UNKNOWN
2021-02-24 14:27:34,834 ERROR [net.schmizz.concurrent.Promise] (default task-7) <> woke to: net.schmizz.sshj.transport.TransportException