Reduce example test frame count to reduce travis time
Reduce example test frame count to reduce travis time

dchilds7/Deysha-Star-Formation,srinathv/vispy,Eric89GXL/vispy,bollu/vispy,bollu/vispy,michaelaye/vispy,kkuunnddaannkk/vispy,julienr/vispy,QuLogic/vispy,inclement/vispy,sbtlaarzc/vispy,ghisvail/vispy,jay3sh/vispy,drufat/vispy,srinathv/vispy,sbtlaarzc/vispy,kkuunnddaannkk/vispy,ghisvail/vispy,julienr/vispy,hronoses/vispy,jdreaver/vispy,jdreaver/vispy,QuLogic/vispy,srinathv/vispy,inclement/vispy,dchilds7/Deysha-Star-Formation,sh4wn/vispy,Eric89GXL/vispy,julienr/vispy,jay3sh/vispy,sh4wn/vispy,hronoses/vispy,sbtlaarzc/vispy,RebeccaWPerry/vispy,bollu/vispy,michaelaye/vispy,drufat/vispy,hronoses/vispy,dchilds7/Deysha-Star-Formation,ghisvail/vispy,jdreaver/vispy,RebeccaWPerry/vispy,sh4wn/vispy,jay3sh/vispy,drufat/vispy,QuLogic/vispy,inclement/vispy,RebeccaWPerry/vispy,michaelaye/vispy,Eric89GXL/vispy,kkuunnddaannkk/vispy