Query nodes for the number of groups supported.  This Fixes #1452.
Cleaned up spelling mistakes and logging
Omited the xml persistance annotation, added a comment
Merge pull request #1459 from digitaldan/zwave-association-fix

Query nodes for the number of groups supported. This Fixes #1452.
workaround for https://github.com/openhab/jupnp/issues/9

Signed-off-by: Kai Kreuzer <kai@openhab.org> (github: @kaikreuzer)