This is not really a test, but it reuses runUnitTest/runTestSuite
commands, because they are good tools to quickly create ERP5
environment and installing business templates.

To re-build and re-export all* business templates, use this command:

    ./bin/runTestSuite --test_suite=ReExportERP5BusinessTemplateTestSuite

--node_quantity argument can also be used to run multiple commands
in parallel.

* note that this does not actually handle all business templates, but
only the ones for which coding style test is enabled, because most
business templates for which it is not enabled can not be installed.