Adapt column name for MS SQLServer compatibility

[buehner]

KEY seems to be a reserved word in SQLServer, so hibernate could not create the schema correctly.

Please review and merge!

[chrismayer]

Hi @buehner , since this only changes the DB itself and it does not affect any other components becuse of the mapping feel free to merge! Thank you!

[marcjansen]

What does this mean if someone updated an existing SHOGun to use this new mapping?

Will hbm2ddl=UPDATE work and rename the column? I am unsure about whether we want to merge this.

[chrismayer]

Oh yes, @marcjansen good point, haven't thought about this. I am also unsure if hbm2ddl=UPDATE will do the stuff for you. Maybe we need a kind of update strategy or a kind of mapping so both column names can work (did not investigate if there is something offering such a mapping)