Remove deprecated algorithms from karaf ssh

in 7.10 in karaf we have to load some of deprecated signing and KEX algorithms for backward compatibility, we should remove them on next release:

https://github.com/jboss-fuse/karaf/blob/4.2.x.redhat-7-x/shell/ssh/src/main/java/org/apache/karaf/shell/ssh/SshUtils.java#L92;L94

https://github.com/jboss-fuse/karaf/blob/4.2.x.redhat-7-x/shell/ssh/src/main/java/org/apache/karaf/shell/ssh/SshUtils.java#L104;L105