gae.py: fix sorting to compare ModuleFile objects via module ids
gae.py: fix sorting to compare ModuleFile objects via module ids

Bug: b/214303235
Change-Id: I67c7ed8c593f53c485d4c9178ce24c807b4ecdd7
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/luci-py/+/3385081
Reviewed-by: Vadim Shtayura <9f116ddb1b24f6fc1916a676eb17161b6c07dfc1@chromium.org>
Commit-Queue: Oleg Tikhonov <4112a3453a8e0b73aee156d192722a0bc9ae1bca@google.com>

luci/luci-py,luci/luci-py,luci/luci-py,luci/luci-py