Skip a few arrow tests on Travis
Skip a few arrow tests on Travis

This is due a strange framebuffer stack problem.

inclement/vispy,jay3sh/vispy,jay3sh/vispy,drufat/vispy,michaelaye/vispy,kkuunnddaannkk/vispy,julienr/vispy,jdreaver/vispy,drufat/vispy,Eric89GXL/vispy,bollu/vispy,dchilds7/Deysha-Star-Formation,QuLogic/vispy,RebeccaWPerry/vispy,jdreaver/vispy,RebeccaWPerry/vispy,jdreaver/vispy,michaelaye/vispy,dchilds7/Deysha-Star-Formation,kkuunnddaannkk/vispy,sbtlaarzc/vispy,ghisvail/vispy,jay3sh/vispy,Eric89GXL/vispy,inclement/vispy,michaelaye/vispy,sbtlaarzc/vispy,QuLogic/vispy,bollu/vispy,srinathv/vispy,srinathv/vispy,julienr/vispy,QuLogic/vispy,inclement/vispy,sbtlaarzc/vispy,kkuunnddaannkk/vispy,ghisvail/vispy,Eric89GXL/vispy,RebeccaWPerry/vispy,drufat/vispy,bollu/vispy,srinathv/vispy,julienr/vispy,ghisvail/vispy,dchilds7/Deysha-Star-Formation