Remove the experiment package.
merge MMcM: Remove the experiment package.

Merge pull request #1549 from MMcM/sql-layer/remove-experiment
https://github.com/FoundationDB/sql-layer/pull/1549
merge MMcM: Split REST services out into a separate plugin

Merge pull request #1542 from MMcM/sql-layer/rest-to-plugin
https://github.com/FoundationDB/sql-layer/pull/1542
New POM structure.
Move files into new subdirectory.
Need to inject Postgres type mapping.
Services config.
Update base test dependencies.
Some tests need to be moved to continue to use the Postgres driver.
This test can be in core if it uses the embedded JDBC driver.
A couple of tests need to borrow stats YAML from the test-jar.
Quiet down tests.
Some config settings should have been shared between Postgres and REST or embedded.
Reference to obsolete parser.