CppunitTest_sw_ww8export: allow invoking a single test only

Change-Id: I601d8473fbe7f989a2380cbd773a6b09c0563ddc
bnc#636128 DOC import: handle FFData.cch

Change-Id: I8020ce561a72f10b8f0f517d50407a802049bd48
bnc#636128 DOC export: handle FFData.cch

Change-Id: Ia1a3a4ef5e61d8ed2a3bde689f3d2101525efc46