fix: Disable stix test with PyMISP on travis.
fix: Disable stix test with PyMISP on travis.

FIRSTdotorg/MISP,MISP/MISP,SteveClement/MISP,FloatingGhost/MISP,FIRSTdotorg/MISP,FIRSTdotorg/MISP,MISP/MISP,FloatingGhost/MISP,MISP/MISP,SteveClement/MISP,SteveClement/MISP,MISP/MISP,MISP/MISP,FloatingGhost/MISP,SteveClement/MISP,FloatingGhost/MISP,SteveClement/MISP,FIRSTdotorg/MISP