[glesys] added options to resuse ip and/or ipv6 and description

Adding fog-suport for optional arguments in Glesys::Server#save to
support
https://github.com/GleSYS/API/wiki/functions_server#wiki-servercreate .
Merge pull request #2010 from teyrow/glesys_fix_options_for_save

[glesys] added options to resuse ip and/or ipv6 and description