Prevent lxml 3.5 or later to be used on OpenShift because its compilation...

Prevent lxml 3.5 or later to be used on OpenShift because its compilation needs more memory than small gears can provide.

openshift/install.sh

@@ -54,6 +54,9 @@ cd ${OPENSHIFT_REPO_DIR}
 # Pin Django version to 1.8 to avoid surprises when 1.9 comes out.
 sed -e 's/Django[<>=]\+.*/Django>=1.8,<1.9/' $OPENSHIFT_REPO_DIR/requirements.txt >/tmp/requirements.txt
 
+# Prevent lxml 3.5 or later to be used on OpenShift because its compilation needs more memory than small gears can provide.
+sed -e 's/lxml[<>=]\+.*/\0,<3.5/' $OPENSHIFT_REPO_DIR/requirements.txt >/tmp/requirements.txt
+
 sh "pip install -U -r /tmp/requirements.txt"
 
 # Install optional dependencies without failing if some can't be installed.