TOOLS-4263 Convert mongofiles put and storage-option tests to Go

[autarch]

Six jstests/files tests covered mongofiles' storage options — --replace,
--prefix, --type, --db, --local — and putting a file much larger than one
GridFS chunk. This replaces them with testify tests in the mongofiles package,
in a new file so the existing GoConvey blocks are left alone.

• test/qa-tests/jstests/files/mongofiles_replace.js -> TestPutReplace and
  TestPutIDRejectsDuplicateID in mongofiles/put_options_test.go - three puts
  of one file leave three fs.files docs, --replace collapses them to one and
  leaves one copy of each other file, and a second put_id with the same _id
  fails with a duplicate-key error without disturbing that file's chunks.
• test/qa-tests/jstests/files/mongofiles_prefix.js -> TestGridFSPrefix - a
  default put writes to fs.*, --prefix custom writes to custom.files and
  custom.chunks and nothing to fs.files, and a get through the same prefix
  returns identical bytes.
• test/qa-tests/jstests/files/mongofiles_type.js -> TestPutContentType -
  --type is stored as metadata.contentType, a put without it stores no
  content type, and the typed file still round-trips byte for byte.
• test/qa-tests/jstests/files/mongofiles_db.js -> TestPutIntoOtherDB - both
  puts land in the database named by --db and the default database stays
  empty.
• test/qa-tests/jstests/files/mongofiles_local.js -> TestPutLocalFileName
  and TestEmptyLocalFileName - --local supplies the bytes while the
  positional argument names the GridFS file, a missing --local path is an
  error, and an empty --local falls back to the GridFS name for both put
  (an error when no local file has that name) and get.
• test/qa-tests/jstests/files/mongofiles_put.js -> TestPutLargeFile - a 40MB
  file is stored with the right length and ceil(length/chunkSize) chunks and
  comes back byte for byte, and putting a directory fails.

The JS tests drove the compiled binary and so also exercised flag parsing (-d,
-t, -l) and ran against standalone, replica set and sharded topologies with
and without auth. Like the rest of this package, the Go tests build MongoFiles
values directly, so they cover the option behavior but not the flag wiring, and
they run against whichever server the integration suite is pointed at.

The jstests/files/*.js glob in the resmoke suites still matches the JS tests
that have yet to be converted, so no suite config changes are needed yet.

[autarch]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• TOOLS-4263 Convert the multi-node dump and restore tests to Go #1143 : 2 dependent PRs (#1144 , #1157 )
• TOOLS-4263 Add multi-node replica set test infrastructure #1142
• TOOLS-4263 Convert the system-CA TLS test to Go #1141
• TOOLS-4263 Convert cluster-topology tests to Go #1140
• TOOLS-4263 Convert mongofiles get and search tests to Go #1139
• TOOLS-4263 Convert mongofiles put and storage-option tests to Go #1138 👈 (View in Graphite)
• TOOLS-4263 Drop the mopt alias for the driver's options package #1137
• TOOLS-4263 Convert mongotop tests to Go #1136
• TOOLS-4263 Convert mongostat tests to Go #1135
• TOOLS-4263 Convert mongoimport option validation tests to Go #1134
• TOOLS-4263 Convert typed-column and parseGrace import tests to Go #1133
• TOOLS-4263 Convert export/import BSON type edge tests to Go #1132
• TOOLS-4263 Convert CSV and TSV round trip tests to Go #1131
• TOOLS-4263 Convert mongodump auth profile dump test to Go #1130
• TOOLS-4263 Convert mongodump views round-trip tests to Go #1129
• TOOLS-4263 Convert mongodump oplog consistency tests to Go #1104
• TOOLS-4263 Convert mongodump query and data behavior tests to Go #1102
• TOOLS-4263 Convert mongodump flag validation tests to Go #1098
• TOOLS-4263 Convert mongorestore users and roles temp collection tests to Go #1097
• TOOLS-4263 Convert mongorestore drop, path and stdin tests to Go #1096
• TOOLS-4263 Convert mongorestore namespace mapping tests to Go #1093
• TOOLS-4263 Convert mongorestore bulk sizing tests to Go #1091
• TOOLS-4263 Convert mongorestore index round-trip tests to Go #1074
• TOOLS-4263 Convert mongorestore collection-options and metadata tests to Go #1073
• TOOLS-4263 Update the JS -> Go conversion skill based on reviewer comments #1148
• master

This stack of pull requests is managed by Graphite. Learn more about stacking.