Special handling for v. in case name search

[jcushman]

We might want to normalize ("lemmatize"?) some very common case name elements, so "US vs Howard" and "United States v. Howard" match the same case.

[mlissner]

We have a synonym list with about 450 entries. Here's v.: https://github.com/freelawproject/courtlistener-solr-server/blob/master/solr/cores/collection1/conf/lang/synonyms_en.txt#L445

And "United States", "US", "USA": https://github.com/freelawproject/courtlistener-solr-server/blob/master/solr/cores/collection1/conf/lang/synonyms_en.txt#L439

It could surely be improved, but it's a good start.

[kilbergr]

Not doing for CAP read only.