common: Pass kwargs to Parser constructor for grammar
common: Pass kwargs to Parser constructor for grammar

This allows the user to change various options for the
grammar, e.g. method for reindexing, handling of NaNs
etc

Signed-off-by: Kapileshwar Singh <d373e2b6407ea84be359ce4a11e8631121819e79@arm.com>

JaviMerino/bart,ARM-software/bart