Removed jsonValues since there already is Data/Json

A more generic possibleFromDynamic.

Alternative method modelling.

Combined multiple Antti's commits

Get rid of uses of gnu.trove2

refs #7156

instantiateUnder function property for types

refs #7157

SCLDropAction

refs #7158

Empty RVI literal in L0

refs #7159

possibleFromDynamic coersion function in Simantics/DB

refs #7160

jsonValues parsing function into Simantics/DB

refs #7161

Generic instantiation action based on instantiateUnder

refs #7162

ModelBrowser.handleDrop action should be run in SWT thread

refs #7163

RVI support in Simantics/Variables

refs #7164

Variables change

Change-Id: If21b623c27b660a9b6bc150c905f0360b15d08a0