Makes sure parserDefitions is initialized. See #894.
Makes sure parserDefitions is initialized. See #894.

Anaphory/beast2,CompEvol/beast2,Anaphory/beast2,tgvaughan/beast2,Anaphory/beast2,CompEvol/beast2,tgvaughan/beast2,tgvaughan/beast2,tgvaughan/beast2,CompEvol/beast2,Anaphory/beast2,CompEvol/beast2