Allow empty column list in ParquetHiveRecordCursor
Fix nested arrays and maps

Previously their stack representation was a string containing json,
instead of just the json value (array/object)
Fix typo
Add proper array and map support to Hive connector
Replace all toUpperCase and toLowerCase using default locale with explicit Locale.ENGLISH.
Remove schema from ConnectorSession
Workaround for segfault in 8u20 due to JDK-8059299
Add catch all exception mapper for HTTP

Mapper logs the exception and request URI
Mapper returns the stacktrace a text/plain response
Add support for collection types to the verifier
Categorize errors for unsupported expressions
Fix SqlTypeByteCodeExpression

Previously it would fail for any type whose name was not a valid java
method name
Enable MaxBy tests for all types
Add support for Maps to verifier
Fix handling of unresolvable artifacts
Load plugins and construct classpath consistently