DRIVERS-2366 Use camelCase for ReadPreference mode in unified tests (#1296)

Author: patrickfreed

source/server-discovery-and-monitoring/tests/unified/rediscover-quickly-after-step-down.json

@@ -117,7 +117,7 @@
               "replSetFreeze": 0
             },
             "readPreference": {
-              "mode": "Secondary"
+              "mode": "secondary"
             },
             "commandName": "replSetFreeze"
           }

source/server-discovery-and-monitoring/tests/unified/rediscover-quickly-after-step-down.yml

@@ -78,7 +78,7 @@ tests:
           command:
             replSetFreeze: 0
           readPreference:
-            mode: Secondary
+            mode: secondary
           commandName: replSetFreeze
       # Run replSetStepDown on the meta client.
       - name: runCommand

source/unified-test-format/unified-test-format.rst

@@ -3772,9 +3772,10 @@ Change Log
              `ClientEncryption Operations`_.
 
 :2022-04-27: **Schema version 1.9.**
-             Added ``createOptions`` field to ``initialData``, introduced a
-             new ``timeoutMS`` field in ``collectionOrDatabaseOptions``, and
-             added an ``isTimeoutError`` field to ``expectedError``.
+             Added ``createOptions`` field to ``initialData``, introduced a new
+             ``timeoutMS`` field in ``collectionOrDatabaseOptions``, and added
+             an ``isTimeoutError`` field to ``expectedError``. Also introduced
+             the ``createEntities`` operation.
 
 :2022-04-27: **Schema version 1.8.**
              Add ``runOnRequirement.csfle``.