Add test showing custom analyzer
Add test showing custom analyzer

**Why**: User discussion on email list revealed our Analyzer docs
needed bolstering. This test demonstrates the simple custom
analyzer use case.

Ref https://lists.apache.org/thread.html/7e0f446bcccddf8faaffbb4fbb5a5265016a06f736f30757f0ee35af@%3Cuser.lucy.apache.org%3E

nwellnhof/lucy,apache/lucy,nwellnhof/lucy,apache/lucy,nwellnhof/lucy,apache/lucy,nwellnhof/lucy,nwellnhof/lucy,apache/lucy,nwellnhof/lucy,apache/lucy,apache/lucy,nwellnhof/lucy,apache/lucy