Add url definitions for EAP to avoid build failure

When building tests using mvn verify without any other parameters
the build would fail because the url for download plugin was not
set properly. Now fixed.-
JBTIS-104 Add integration-tests repo definition to root pom

As a consequence of JBTIS-104 and JBIDE-13790, parent pom now contains
a reference to coretests, not integrationtests. In order to resolve
dependencies for bot.ext (and/or others), we need this repo definition.