Support for non-string keys when serializing TabularData

[rhuss]

Up to now, when accessing an MBean attribute of type TabularData with a path, then only string keys are supported for the path attributes.

See this dicussion . This is the spot in the source.

Since we already know how to convert a string to an OpenType this should be a big deal, however, at this place we unfortunately don't have access to this string-to-object converter.

For the short term (1.1.2), I'll add (and somewhat duplicate) conversion string-to-simple type in the TabularDataExtractor.

For the mid to long term (2.0) I'm doing quite some refactoring in order to improve modularity. Here it will be possible for the TabularDataExtractor to access the other converters, too and hence can convert any open type from a string.

[rhuss]

Quick fix added, I also just pushed out a 1.1.2-SNAPSHOT to labs.consol.de

[rhuss]

Fixed.