rclone test suite failures

[halkyon]

When running the rclone test suite, there are currently a couple of failures in the fs/operations test suite, relating to storage tier, and modification times. Some of these were fixed in 5be39ed, but there are still some failures remaining.

This can be replicated by starting Gateway-ST locally with a working storj-sim, checking out rclone, building and running the test runner and running it:

cd /tmp
git clone https://github.com/rclone/rclone
cd rclone
git checkout v1.57.0

go build ./fstest/test_all
go build

./rclone config create TestS3 s3 \
  env_auth false \
  provider Minio \
  endpoint "http://127.0.0.1:7777" \
  access_key_id "$(storj-sim network env GATEWAY_0_ACCESS_KEY)" \
  secret_access_key "$(storj-sim network env GATEWAY_0_SECRET_KEY)" \
  upload_concurrency 16 \
  chunk_size 64M \
  upload_cutoff 64M

./test_all -backends s3 -remotes TestS3: -maxtries 1 -verbose

In order to work around the failures, the broken tests can be filtered out by only running the working suite:

./test_all -backends s3 -remotes TestS3: -tests "fs/sync" -maxtries 1 -verbose

Example failures from the "fs/operations" suite that are failing:

=== RUN   TestIntegration/FsMkdir/FsPutFiles/SetTier
    fstests.go:1662: 
        	Error Trace:	fstests.go:1662
        	Error:      	Expected nil, but got: &s3err.RequestFailure{RequestFailure:(*awserr.requestError)(0xc0000ca500), hostID:""}
        	Test:       	TestIntegration/FsMkdir/FsPutFiles/SetTier
    fstests.go:1664: 
        	Error Trace:	fstests.go:1664
        	Error:      	Not equal: 
        	            	expected: "STANDARD_IA"
        	            	actual  : "STANDARD"
        	            	
        	            	Diff:
        	            	--- Expected
        	            	+++ Actual
        	            	@@ -1 +1 @@
        	            	-STANDARD_IA
        	            	+STANDARD
        	Test:       	TestIntegration/FsMkdir/FsPutFiles/SetTier

2021/12/10 15:39:08 DEBUG : no_checksum_big_file_from_pipe: Modification times differ by 87301h39m8.876543211s: 2011-12-25 12:59:59.123456789 +0000 UTC, 2021-12-10 02:39:08 +0000 UTC
2021/12/10 15:39:08 ERROR : no_checksum_big_file_from_pipe: corrupted on transfer
    operations_test.go:1467: 
        	Error Trace:	operations_test.go:1467
        	            				operations_test.go:1478
        	Error:      	Received unexpected error:
        	            	corrupted on transfer
        	Test:       	TestRcat
=== CONT  TestRcat/withChecksum=false,ignoreChecksum=false
    testing.go:1169: test executed panic(nil) or runtime.Goexit: subtest may have called FailNow on a parent test
--- FAIL: TestRcat (0.41s)
    --- FAIL: TestRcat/withChecksum=false,ignoreChecksum=false (0.41s)