Patch converting schema uses of SynonymFilterFactory to SynonymGraphFilterFactory. In index analyzers, a FlattenGraphFilterFactory is added as the last filter; and in fieldtypes with a dual purpose <analyzer>, the analyzer is split into index and query analyzers, and the FlattenGraphFilterFactory is added to the index analyzer.
Not included here: switching ManagedSynonymFilterFactory to use SynonymGraphFilterFactory as its delegate. I'll make a separate issue.
Running all Solr tests and precommit now.