Resolve "Login to SSH server"
Implemented simple ssh login process. Code is able to login to a server and to close the connection as well. Several Result objects are provided to be used by the management.
A switch from Swing to Java FX has to be done in the future, I propose that for the end of this or in the next sprint. A unit test will be added after the decision which junit version to use and addition to the pom file afterwards. Closes #14 (closed)