Add version of phpunit into travis script.

.travis.yml

htdocs/compta/facture/class/facture.class.php

htdocs/core/class/commonobject.class.php

htdocs/core/lib/functions2.lib.php

htdocs/core/lib/pdf.lib.php

htdocs/core/modules/commande/doc/pdf_einstein.modules.php

htdocs/core/modules/expedition/doc/pdf_merou.modules.php

htdocs/core/modules/expedition/doc/pdf_rouget.modules.php

htdocs/core/modules/fichinter/doc/pdf_soleil.modules.php

htdocs/core/modules/modAdherent.class.php

htdocs/core/modules/modAgenda.class.php

htdocs/core/modules/modBanque.class.php

htdocs/core/modules/modBookmark.class.php

htdocs/core/modules/modCommande.class.php

htdocs/core/modules/modContrat.class.php

htdocs/core/modules/modFicheinter.class.php

htdocs/core/modules/modWorkflow.class.php

htdocs/core/modules/project/pdf/pdf_baleine.modules.php

...core/modules/supplier_invoice/pdf/pdf_canelle.modules.php

...ore/triggers/interface_50_modAgenda_ActionsAuto.class.php