LPS-34085 Oracle's JDBC driver isn't handled well by our build scripts

Hi Tamás,

This ticket doesn't have to be handled with priority, it's not within the frame of technical support.

I was just annoyed by having to copy Oracle's JDBC drivers manually every time I did an "ant all", thus I fixed it.

There were a few other problems I found:

* Obsolete jars: ifxjdbc.jar,ifxjdbcx.jar -> These are for Informix, but Liferay doesn't work on Informix.
* Jars for DB2 were missing from ${jdbc.drivers}.
* Modified a few build-test*.xml to use the newly defined variables.

Cheers,
Laci.