Add error_exit calls for optional deps.

Author: theengineear

circle/setup.sh

@@ -29,9 +29,11 @@ for version in ${PLOTLY_PYTHON_VERSIONS[@]}; do
     then
         pip install simplejson ordereddict ||
             error_exit "${LINENO}: can't install extras for Python ${version}"
-        pip install -r ${PLOTLY_OPTIONAL_REQUIREMENTS_FILE_2_6}
+        pip install -r ${PLOTLY_OPTIONAL_REQUIREMENTS_FILE_2_6} ||
+            error_exit "${LINENO}: can't install optional for Python ${version}"
     else
-        pip install -r ${PLOTLY_OPTIONAL_REQUIREMENTS_FILE}
+        pip install -r ${PLOTLY_OPTIONAL_REQUIREMENTS_FILE} ||
+            error_exit "${LINENO}: can't install optional for Python ${version}"
     fi
 
     # install some test tools