Issue 491 CREATE OR REPLACE TRIGGER does not have DECLARE section for definition variables

This fix if someone is declaring in begining of trigger some variables ended by ;
If ; was there flyway ended script and started new
Merge branch 'master' of https://github.com/cipous/flyway

Conflicts:
	flyway-core/src/main/java/com/googlecode/flyway/core/dbsupport/oracle/OracleSqlStatementBuilder.java