fix(encryption): do not attempt to merge autoEncryption options

Attempting to do so while keyVaultClient is present will
result in infinite recursion

Author: daprahamian

lib/operations/connect.js

@@ -515,7 +515,7 @@ function createUnifiedOptions(finalOptions, options) {
     'rs_options',
     'mongos_options'
   ];
-  const noMerge = ['readconcern', 'compression'];
+  const noMerge = ['readconcern', 'compression', 'autoencryption'];
 
   for (const name in options) {
     if (noMerge.indexOf(name.toLowerCase()) !== -1) {