When launching selenium rc tests -Dwebdriver.firefox.bin is ignored

When trying to launch selenium rc tests (nuxeo-distribution-cap-selenium-tests) with:

mvn org.nuxeo.build:ant-assembly-maven-plugin:integration-test -Pqa -Dtarget=run-selenium -Dsuites=suite1 -Dwebdriver.firefox.bin="/opt/firefox26/firefox"

-Dwebdriver.firefox.bin="/opt/firefox26/firefox" is just ignored, it looks like it is lost in nuxeo-ftest.xml

Note that:

• Nuxeo 5.8 -> ftests 1.7.10
• Nuxeo 6.0 -> ftests 1.7.16
• Master & Nuxeo 7.10 -> ftests 1.7.20

I don't think we can run tests with ftests 1.7.20 on Nuxeo 5.8 and 6.0 because user-extension won't be compatible, so we might need to release 1.7.10.1 and 1.7.16.1?