CXX-1719 should use majority wc for commitTxn

Author: bazile-clyde

data/transactions/run-command.json

@@ -248,6 +248,7 @@
     },
     {
       "description": "run command fails with explicit secondary read preference",
+      "skipReason": "read preferences in database::run_command are not supported",
       "operations": [
         {
           "name": "startTransaction",

src/mongocxx/test/spec/transactions.cpp

@@ -202,8 +202,7 @@ void run_transactions_tests_in_file(const std::string& test_path) {
         bool fail_point_enabled = (bool)test["failPoint"];
         auto description = test["description"].get_utf8().value;
         INFO("Test description: " << description);
-        if (description.compare("run command fails with explicit secondary read preference") == 0) {
-            WARN("Skipping test - read preferences in database::run_command are not supported");
+        if (should_skip_spec_test(client{uri{}}, test.get_document().value)) {
             continue;
         }
 
@@ -383,12 +382,6 @@ TEST_CASE("Transactions spec automated tests", "[transactions_spec]") {
         path.pop_back();
     }
 
-    client client{uri{}};
-    if (test_util::get_max_wire_version(client) < 7) {
-        WARN("Skipping - max wire version is < 7");
-        return;
-    }
-
     std::ifstream test_files{path + "/test_files.txt"};
     REQUIRE(test_files.good());