update key vault collection (#901)

Author: biniona-mongodb

driver-sync/src/examples/tour/ClientSideEncryptionAutoEncryptionSettingsTour.java

@@ -59,7 +59,7 @@ public static void main(final String[] args) {
            }});
         }};
 
-        String keyVaultNamespace = "admin.datakeys";
+        String keyVaultNamespace = "encryption.__keyVault";
         ClientEncryptionSettings clientEncryptionSettings = ClientEncryptionSettings.builder()
                 .keyVaultMongoClientSettings(MongoClientSettings.builder()
                         .applyConnectionString(new ConnectionString("mongodb://localhost"))

driver-sync/src/examples/tour/ClientSideEncryptionSimpleTour.java

@@ -52,7 +52,7 @@ public static void main(final String[] args) {
            }});
         }};
 
-        String keyVaultNamespace = "admin.datakeys";
+        String keyVaultNamespace = "encryption.__keyVault";
 
         AutoEncryptionSettings autoEncryptionSettings = AutoEncryptionSettings.builder()
                 .keyVaultNamespace(keyVaultNamespace)