SERVER-32522 Clean up {read,write}Concern and readPreference overrides.

Introduces OverrideHelpers object with convenience methods for
inspecting certain aggregation and map-reduce commands, as well as
overriding startParallelShell(), Mongo.prototype.runCommand(), and
Mongo.prototype.runCommandWithMetadata().

Also removes a number of tests that were incorrectly blacklisted from
the read_concern_majority_passthrough.yml and
read_concern_linearizable_passthrough.yml test suites.

(cherry picked from commit 35b5b72146ca570b5c6fed8aaa7e891edf7d6a78)
(cherry picked from commit e828226f4c5ab12835e10a09f104759e8fbf09f3)

1 files changed, 3 insertions, 3 deletions

diff --git a/jstests/core/regex_not_id.js b/jstests/core/regex_not_id.js
index 1f15250f240..35b2c858867 100644
--- a/jstests/core/regex_not_id.js
+++ b/jstests/core/regex_not_id.js
@@ -3,10 +3,10 @@
 var testColl = db.regex_not_id;
 testColl.drop();
 
-assert.writeOK(testColl.insert({_id: "ABCDEF1"}, {writeConcern: {w: 1}}));
+assert.writeOK(testColl.insert({_id: "ABCDEF1"}));
 
 // Should be an error.
-assert.writeError(testColl.insert({_id: /^A/}, {writeConcern: {w: 1}}));
+assert.writeError(testColl.insert({_id: /^A/}));
 
 // _id doesn't have to be first; still disallowed
-assert.writeError(testColl.insert({xxx: "ABCDEF", _id: /ABCDEF/}, {writeConcern: {w: 1}}));
\ No newline at end of file
+assert.writeError(testColl.insert({xxx: "ABCDEF", _id: /ABCDEF/}));