ZODB Components: Allow to execute runUnitTest for bt5 Test Components.

Usage: runUnitTest test.VERSION.REFERENCE as exported on the filesystem. Also,
add bt5 Test Components to tests being run through erp5testnode.
TemplateTool: Do not change the resolved depends list when installing bt5s with depends.

Considering erp5_configurator_ung depending on erp5_configurator which in turn
depends on erp5_workflow, if erp5_workflow and erp5_configurator_ung are
specifically added to the list of bt5 installed with depends, then erp5_workflow
would end up being installed *after* erp5_configurator.