fixup! fixup! fixup! fixup! fixup! fixup! fixup! fixup! fixup! Fix Travis when SIX_VERSION isn't specificed

Author: gsnedders

requirements-install.sh

@@ -5,13 +5,12 @@ if [[ $USE_OPTIONAL != "true" && $USE_OPTIONAL != "false" ]]; then
   exit 1
 fi
 
-pip install pytest-expect\<2.0,\>=1.1 six
-exit 2
-
-pip install -U setuptools wheel pip
+pip install -U setuptools pip==6.0.7
 
 pip install -U -r requirements-test.txt
 
+exit 2
+
 if [[ $USE_OPTIONAL == "true" ]]; then
   pip install -U -r requirements-optional.txt
 fi