Increase CHE boot timeout in deploy_che.sh (#8605)

dockerfiles/init/modules/openshift/files/scripts/deploy_che.sh

@@ -62,7 +62,7 @@ wait_until_che_is_available() {
     available=$(oc get dc che -o json | jq '.status.conditions[] | select(.type == "Available") | .status')
     progressing=$(oc get dc che -o json | jq '.status.conditions[] | select(.type == "Progressing") | .status')
 
-    DEPLOYMENT_TIMEOUT_SEC=120
+    DEPLOYMENT_TIMEOUT_SEC=300
     POLLING_INTERVAL_SEC=5
     end=$((SECONDS+DEPLOYMENT_TIMEOUT_SEC))
     while [ "${available}" != "\"True\"" ] && [ ${SECONDS} -lt ${end} ]; do