Schema dereferencing requires ramls dir; fix sortBy

• RMB-103: Schema dereferencing requires a ramls/ directory with the raml and schema files.
• CQLPG-29 "sortBy field" sorts by null (cql2pgjson:1.3.3)

Other changes:

• RMB-106: Set Locale.US, use Logger, split into separate tests.
• importSQL tenant sensitive
• RMB-110: Lift time limit in PostgresClientIT.parallel(...)
• hack to handle simple text response for rmb http client
• ResourceUtil.asString(...): more documentation, more options