change startup parsing to eval

done for similar reason as 2e366792c1

java/entrypoint.sh

@@ -46,4 +46,4 @@ PARSED=$(echo "${STARTUP}" | sed -e 's/{{/${/g' -e 's/}}/}/g' | eval echo "$(cat
 # from the container itself.
 printf "\033[1m\033[33mcontainer@pterodactyl~ \033[0m%s\n" "$PARSED"
 # shellcheck disable=SC2086
-exec env ${PARSED}
+eval ${PARSED}