Create JDBC connection strings for temporary use (ie.
Package org.apache.taverna.platform.spring.jdbc Description
Extensions to the JDBC parts of Spring, and support for proxying of JDBC
drivers so we can load them dynamically from raven artifacts. The proxy
approach is inspired by http://www.jroller.com/tackline/entry/dynamically_loading_jdbc_drivers
with additions to build from raven rather than from existing jar files.