Switch to old travis image to fix issue #169

Author: konserw

.travis.yml

@@ -1,3 +1,5 @@
+group: deprecated-2017Q3
+
 language: cpp
 os: linux
 sudo: required

travis.sh

@@ -66,8 +66,8 @@ for TEST in \
     build/examples/CalcQt/BoostCalculatorQtSteps \
 ; do
     if [ -f "${TEST}" -a -n "${DISPLAY:-}" ]; then
-        "${TEST}" 2> /dev/null &
-        sleep 1
+        "${TEST}" 2> /dev/null  &
+        sleep 1 
         cucumber examples/CalcQt
         wait %
     fi