Issue #2: running 'ant hsql' is no longer required!

The Jetty instance is configured to provide a 'file' hsqldb instance,
rather than connecting to the port the separate instance is running on.
Remove InitializeSchedulingAssistantDatabase

src/main/sql is also gone (the scripts are now managed in the
bw-sometime-database module). Refactor NeedsTestDatabase to use Flyway
instead of scripts previously in src/main/sql.
Fixed JUnit Assert import
Removed oracle/postgres destroy scripts (unused by tests)
So long ant hsql!

Removes ant build file, bootstrap folder, and anything related to
running 'ant hsql' separately.