Add DdlStatementExecution
wrapper around JDBC Statement for DDL
Convert CoreTests to use Execute Ddl for DDL
Add a Create Trigger test for Oracle
Add createDdlStatementExecution to DBEnvironment
Add ExecuteDdl fixture
Update docs with Execute Ddl
Merge pull request #312 from dbfit/add-execute-ddl-fixture

Add Execute Ddl fixture
Merge recent core changes from upstream.
Update Teradata adaptor for new Execute Ddl fixture