Fix failed configurations

Author: comandeo-mongo

.evergreen/config/common.yml.erb

@@ -392,6 +392,8 @@ functions:
         working_dir: "src"
         script: |
           ${PREPARE_SHELL}
+          unset TOPOLOGY
+          export TOPOLOGY=${MLAUNCH_TOPOLOGY}
           .evergreen/run-tests-aws-auth.sh
 
   "run Kerberos unit tests":

spec/integration/secondary_reads_spec.rb

@@ -2,6 +2,8 @@
 require 'spec_helper'
 
 describe 'Secondary reads' do
+  require_mri
+
   before do
     root_authorized_client.use('sr')['secondary_reads'].drop
     root_authorized_client.use('sr')['secondary_reads'].insert_one(test: 1)