ANALYZE TABLE ... REFRESH METADATA fails with FLOAT4 column

For tables with fewer than ~200 rows and a FLOAT4 column there is no bug: the ANALYZE command succeeds and, indeed, this case is exercised by tests in TestMetastoreCommands.java and alltypes_{required,optional}.parquet which both contain a FLOAT4 column.

But for tables with more than ~200 rows and a FLOAT4 column the ANALYZE command fails with

```

SQL Error: EXECUTION_ERROR ERROR: PojoRecordReader doesn't yet support conversions from the type [class java.lang.Float].

Failed to setup reader: DynamicPojoRecordReader

```

E.g. you can reproduce the above with

```

create table dfs.tmp.test_analyze as
select cast(1 as float) from cp.`employee.json`;

analyze table dfs.tmp.test_analyze refresh metadata;
```

I believe that the bug is easily fixed by adding support for Java.lang.Float to PojoWriters.java.  I do not know why it requires more than ~200 rows for the code path through PojoRecordReader to come into play, and for this bug to manifest.